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B. 2a x a2 can be simplified to 2a3 . Simplify the following: 1). 2a x 3 2). 6c x 4 3). 2d x 5 4). 3 x 7f 5). 9p x 46). 3a x 4b 7). 7c x 3d 8). 5p x 4q 9). 9f x 10p 10). 7t x 5u
11). 3a x 2a 12). 4g x 2g 13). 6f x 3f 14). 9p x 2p 15). 4q x 6q 16). 3ab x 4f 17). 6g x 3hi 18). 9pq x 4s 19). 5gh x 7i 20). 9pq x 7r 21). 6ab x 3a 22). 2cd x 3d 23). 4fg x 5f 24). 9pq x 6q 25). 4fg x 5g 26). 6a2 x 4b 27). 9c2 x 3d 28). 2d2 x 6e 29). 7e x 4f2 30). 6s x 3t2
31). 2a x 4ab 32). 7d x 3de 33). 6s x 4st 34). 9g x 7gh 35). 4p x 9pq 36). 4a2 x 2ab 37). 6pq x 7p3 38). 9cd x 3c2 39). 5s3 x 6st 40). 7n4 x 3mn 41). 4a3 x 2a5 42). 7p2 x 4p6 43). 9c3 x 3c4 44). 7c2 x 5c6 45). 4r3 x 9r7
46). 2a2b x 3ab3 47). 5p2q x 2pq3 48). 4st3 x 6st 49). 9cd2 x 4c5d 50). 6f2g x 3fg4
3). Substitution
A. If a = 4 find the value of 1). 3a 2). 4a + 2 3). 5 + 2a 4). 14 - 3a 5). 12a - 96). a2 7). a3 8). 3a2 9). 2a3 + 4 10). 9a + a2
B. If t = 3 find the value of 1). 4t 2). 5t + 4 3). 6t + 9 4). 16 - 5t 5). 4 + 2t 6). t 2 7). t4 8). 4t2 9). 5t2 + 9 10). 30 - 2t2
C. If n = 5 find the value of 1). 6 - n 2). 17 - 3n 3). 3n - 4 4). 6n - 14 5). 35 - 5n 6). n2 7). n4 8). 4n2 9). 3n2 - 2n 10). 2n2 + 3nD. If g = 8 find the value of 1). 2g - 9 2). 6g - 45 3). 76 - 4g 4). 16 - 2g 5). 54 - 5g 6). g2 7). 3g2 8). 200 - 2g2 9). 9g - g2 10). 3g2 - 5g
1). A gardener is planting flowers. He buys 4 bags with t daffodils in each. When he opens upthe bags he finds 7 daffodil bulbs have gone bad.a). Write an expression for the number of daffodils he can plant.b). He actually planted 33 daffodils. Use this information to form an equation.c). Solve this equation to find the number of daffodils in each bag.
2). Sally has f bags of lego, in each are 22 lego blocks. Sam has 9 lego blocksspare so gives them to Sally.a). Write an expression for the number of lego blocks Sally has.b). Sally actually has 119 blocks of lego. Use this information to form an equation.c). Solve this equation to find the number of lego bags Sally has.
3). In Marbles R Us, they sell marbles in boxes. Zeeshan buys 9 bags, each containing qmarbles. On the way home he plays Mark and wins another 8 marbles.a). Write an expression for the number of marbles Zeeshan has after these games.b). Zeeshan counts his marbles and find he has 116.
Use this information to form an equation.c). Solve this equation to find how many marbles are sold in each bag.
4). A newspaper boy gets paid £ g a week for delivering papers. After 4 weeks he asks for hiswages, but he is deducted £2 for delivering papers to wrong houses.a). Write an expression for the amount he is paid, in £'s.b). He looks in his pay packet and finds £ 22. Use this information to form an equation.c). Solve this equation to find how much he is paid per week.
5). On a school trip, y minibuses are needed. Each minibus will hold 14 pupils. After filling upeach minibus the last mini bus has 3 spare seats.a). Write an expression for the number of pupils going on the trip.b). The teacher counts 81 pupils getting on the minibuses.
Use this information to form an equation.c). Solve this equation to find how many minibuses were used.
6). A cucumber farmer plants p cucumber seeds in a row. He plants 6 rows of these cucumberseeds. Three months later he finds insects have eaten 7 of the plants.a). Write down an expression for the number of cucumbers plants he has left.b). His wife boxes up the plants for market and finds she has 71 cucumber plants.
Use this information to form an equation.c). Solve this equation to find out how many cucumber seeds he planted in a row.
7). Gemma gets paid £ 8 at weekends for washing cars. After x weeks she asks for her wages,included in her wages is a Christmas bonus of £ 7.a). Write an expression for the amount she is paid.b). She looks in her pay packet and finds £ 79. Use this information to form an equation.c). Solve this equation to find how many weeks pay she picks up.
8). Parents transport the School football team to a match in p cars. Each car holds 4 membersof the squad. All the cars are full except the last one which only has 1 player in it.a). Write an expression for the number of players taken to the match.b). The manager checks the 17 players in the squad arrive.
Use this information to form an equation.c). Solve this equation to find how many cars are used.
9). Billy thinks of a number, v . He doubles it and subtracts 5 to get a new numbera). Write an expression for the new number.b). 27 is his new number. Use this information to form an equation.c). Solve this equation to find what the original number was.
10). Anthony now thinks of a number, f . He trebles it and adds 9 to get a new numbera). Write an expression for the new number.b). 42 is his new number. Use this information to form an equation.c). Solve this equation to find what the original number was.
11). Lynne joins in and thinks of a number, q . She halves it and adds 5 to get a new numbera). Write an expression for the new number.b). 14 is her new number. Use this information to form an equation.c). Solve this equation to find what the original number was.
12). A rectangular flower bed is x metres wide by ( x + 3 ) metres long.a). Write an expression for the perimeter of the flower bed.b). The perimeter is measured at 34 metres. Use this information to
form an equation.c). Solve this equation to find the length and width of the flower bed.
13). A rectangular lawn is measured at y metres wide by ( 2y + 5 ) metres long.a). Write an expression for the perimeter of the lawn.b). The perimeter is measured at 52 metres.
Use this information to form an equation.c). Solve this equation to find the length and width of the lawn.
14). A triangular playground has it's three sides measured at f metres,( f + 4 ) metres and ( f + 5 ) metres.a). Write an expression for the perimeter of the playground.b). The perimeter is measured at 51 metres.
Use this information to form an equation.c). Solve this equation to find the lengths of all the sides of the playground.
Harder Questions.
15). Two rectangular lawns, shown, are made so that each has the same sized perimeter.The first has dimensions 2a metres by 3a metres.The second has dimensions a metres by ( a + 6 ) metres.
a). Use this information to form an equation.b). Solve this equation to find the perimeter of each lawn.c). State the dimensions of each lawn.
16). Two rectangular flower beds, shown, are made so that each has the same sized perimeter.The first has dimensions ( 3p + 2 ) metres by ( 2p + 1 ) metres.The second has dimensions ( p + 8 ) metres by ( 2p + 3 ) metres.
a). Use this information to form an equation.b). Solve this equation to find the perimeter of each flower bed.c). State the dimensions of each flower bed.
Put it into the equation and move that many places.If the number is negativenegativenegativenegativenegative then you must move backwardsbackwardsbackwardsbackwardsbackwards !
When you work out the answer on a calculator there may be a seriesof decimal places, ignore them and take the whole number answer
(this is called truncatingtruncatingtruncatingtruncatingtruncating).The winner is the first person to complete one circuit.
Each question is to be answered on its own set of axes (i.e. three graphs to one set of axes).For the questions 1 -10, the x-axis should go from 0 to 10 using the 1 cm squares,
and the y-axis from 0 to 18 using the 1 cm squares.
1). Plot the following graphs.a). y = x b). y = x + 9 c). y = x + 2
d). What shape are the graphs ?e). What have these lines have in common ?
2). Plot the following graphs.a). y = 2x + 6 b). y = 2x + 3 c). y = 2x
d). What shape are the graphs ?e). What have these lines have in common ?
3). Plot the following graphs.a). y = x + 1 b). y = 2x + 1 c). y = 3x + 1
d). What have these lines have in common ?
4). Plot the following graphs.a). y = 4 + 3x b). y = 3x c). y = 2 + 3x
d). What have these lines have in common ?
5). Plot the following graphs.a). y = 1 x + 10 b). y = 1 x c). y = 1 x + 5
2 2 2d). What have these lines have in common ?
6). Plot the following graphs.a). y = 2x + 4 b). y = 1 x + 4 c). y = 4 + x
2d). What have these lines have in common ?
7). Plot the following graphs.a). y = 6 - x b). y = 15 - x c). y = 9 - x
8). Plot the following graphs.a). y = -2x + 12 b). y = -2x + 10 c). y = -2x + 16
9). Plot the following graphs.a). y = 13 - 1 x b). y = 6 - 1 x c). y = 9 - 1 x
2 2 2
10). Plot the following graphs.a). y = 5 + x b). y = 1 x + 5 c). y = 5 - 2x
3
11). Look at all the graphs you have plotted and their equations.Say which part of the equation affects the line and how.
For the rest of the questions, the x-axis should go from -8 to +8 using the 1 cm squares,and the y-axis from -10 to +10 using the 1 cm squares.
12). Plot the following graphs.a). y = x - 4 b). y = x c). y = x + 3
13). Plot the following graphs.a). y = 2x - 6 b). y = 1 x - 6 c). y = 4x - 6
2
14). Plot the following graphs.a). y = 3 - x b). y = -x - 2 c). y = - 5 - x
15). Plot the following graphs.a). y = -1 x + 3 b). y = -1 x - 2 c). y = -1 x - 4
3 3 3
16). Plot the following graphs.a). y = 2x - 5 b). y = 2 - 1 x c). y = 10 - 4x
2
Functions can also be written in other ways. y = 2x + 3 could be written f(x) � 2x + 3 or f:x � 2x + 3.
These are both read "the function of x mapped into 2x + 3 ".When plotting on axes, the vertical axis is marked f(x) or f:x respectively, instead of y.
17). Plot the following graphs.a). f(x) � 1 x + 5 b). f(x) � 1 x - 3 c). f(x) � 1 x
4 4 4
18). Plot the following graphs.a). f(x) � 3x - 2 b). f(x) � 6 + 1 x c). f(x) � 7 - x
2
19). Plot the following graphs.a). f:x � 4 - x b). f:x � -2x + 1 c). f:x � 1 x - 5
220). a). Mark the coordinates (3, -10) and (3, 10) on a new set of axes.
b). Join the two points.c). Mark five other points on the line and write their coordinates.d). What do you notice about all the coordinates on this line ?e). Mark the coordinates (-5, -10) and (-5, 10).f). Repeat steps b). to d). for this line.g). Mark the coordinates (-8, 4) and (8, 4).h). Repeat steps b). to d). for this line.i). Mark the coordinates (-8, -7) and (8, -7).j). Repeat steps b). to d). for this line.
21). Draw the graphs of these equations.a). x = 6 b). y = 8 c). x = -1 d). y = -3 e). x = 7f). y = -2 g). y = 5 h). x = -4 i). x = 0 j). y = 0k). What is another name for i). x = 0 ii). y = 0 ?
Practical Number Patterns (Linear).1). Here is a pattern of squares.
a). Find the formula that links the width (W) of eachdiagram and the perimeter (P) of each diagram.
b). Using this formula, find the Perimeter (P), when the width (W) is :-i). 9 ii). 12 iii). 20.
c). Using this formula, find the width (W) when the perimeter (P) is :-i). 20 ii). 44 iii). 96.
d). Find also a formula that links the width (W) to the number of squares (S).e). Using this formula, find the number of squares (S), when the width (W) is :-
i). 7 ii). 11 iii). 15.f). Using this formula, find the width (W) when the number of squares (S) is :-
i). 15 ii). 37 iii). 49.
2). Here are some diagrams that are made up of matches.a). Find the formula that links the
number of rectangles (R) and thenumber of matches (M).
b). Using this formula, find the number of matches when the number of rectangles is :-i). 6 ii). 9 iii). 18.
c). Using this formula, find the number of rectangles when the number of matches is :-i). 77 ii). 121 iii). 253.
d). Find also a formula that links the number of rectangles (R) and triangles (T) together.e). Using this formula, find the number of triangles when the number of rectangles is :-
i). 8 ii). 12 iii). 25.f). Using this formula, find the number of rectangles when the number of triangles is :-
i). 55 ii). 67 iii). 83.
3). Here are some diagrams that are made up of matches.a). Find the formula that links the number of
triangles (T) and the perimeter (P) of each diagram.b). Using this formula, find the perimeter when the number of triangles is :-
i). 7 ii). 15 iii). 28.c). Using this formula, find the number of triangles when the perimeter is :-
i). 19 ii). 26 iii). 35.d). Find also a formula that links the number of triangles (T) and matches (M) together.e). Using this formula, find the number of matches when the number of triangles is :-
i). 6 ii). 9 iii). 24.f). Using this formula, find the number of triangles when the number of matches is :-
i). 25 ii). 33 iii). 43.
4). Here are some diagrams that are made up of matches.a). Find the formula that links the number of
squares (S) and the perimeter (P) of each diagram.b). Using this formula, find the perimeter when the number of squares is :-
i). 7 ii). 16 iii). 31.c). Using this formula, find the number of squares when the perimeter is :-
i). 20 ii). 28 iii). 60.d). Find also a formula that links the number of squares (S) and matches (M) together.e). Using this formula, find the number of matches when the number of squares is :-
i). 6 ii). 14 iii). 34.f). Using this formula, find the number of squares when the number of matches is :-
5). A fence is made up out of wooden planks that can either be posts (up) or bars (across).a). Find the formula that links the number of
posts (P) and the number of bars (B).b). Using this formula, find the number of bars when the number of posts is :-
i). 8 ii). 17 iii). 26.c). Using this formula, find the number of posts when the number of bars is :-
i). 20 ii). 42 iii). 68.d). Find a formula that links the number of posts (P) and total planks used (T) together.e). Using this formula, find the number of planks when the number of posts is :-
i). 6 ii). 14 iii). 33.f). Using this formula, find the number of posts when the number of planks is :-
i). 22 ii). 49 iii). 85.
6). Here are some diagrams that are made up of cubes.a). Find the formula that links the shaded cubes
(S) and the white cubes (W) in each diagram.b). Using the formula, find the number of white cubes when the number of shaded cubes
is :- i). 7 ii). 16 iii). 31.c). Using the formula, find the number of shaded cubes when the number of white cubes
is :- i). 24 ii). 44 iii). 60.d). Find also a formula that links the number of shaded cubes (S) with the total number
of cubes used (T).e). Using this formula, find the total number of cubes when the number of shaded cubes
is :- i). 9 ii). 15 iii). 36.f). Using this formula, find the number of shaded cubes when the total number of cubes
is :- i). 27 ii). 45 iii). 69.
7). Here are some diagrams that are made up of matches.a). Find the formula that links the width (W) and the
perimeter (P) of each diagram.b). Using this formula, find the perimeter when the width is :-
i). 6 ii). 17 iii). 29.c). Using this formula, find the width when the perimeter is :-
i). 26 ii). 40 iii). 74.d). Find also a formula that links the width (W) and total number of matches (M) used.e). Using this formula, find the number of matches when the width is :-
i). 9 ii). 12 iii). 43.f). Using this formula, find the width when the number of matches is :-
i). 97 ii). 122 iii). 187.
8). Here are some diagrams that are made up of matches.a). Find the formula that links the
number of matches across the topof each diagram (M), and thenumber of triangles (T) in each diagram.
b). Using this formula, find the number of triangles when the number of matches at thetop is :- i). 11 ii). 23 iii). 61.
c). Using this formula, find the number of matches at the top when the number oftriangles is :- i). 40 ii). 112 iii). 196.
d). Find also a formula that links the number of matches at the top (M) and total numberof matches used (N).
e). Using this formula, find the total number of matches when the number of matches atthe top is :- i). 9 ii). 26 iii). 57.
f). Using this formula, find the number of matches at the top when the total number ofmatches is :- i). 114 ii). 233 iii). 520.
1). For this investigation you will need square dotty paper.A polygon is a closed shape made out of straight lines.a). Draw some polygons that have no dots inside them.
Count the number of dots along the perimeter of the polygonand find the area of the polygon.Polygon 1 has 8 dots on the perimeter and anarea of 3 units.Polygon 2 has 5 dots on the perimeter and anarea of 11/
2 units.
Copy and complete the table for polygons with no dots inside them.
No. of dots on perimeter, n 3 4 5 6 7 8 9 Area of polygon, A
Find a formula that links n and A.
b). Repeat the above investigation for polygons that have just 1 dot on the inside.Hence find a formula that links n with A for these polygons.
c). Investigate the above for 2, 3, 4, 5...dots on the inside of the polygon.d). Find a relationship between the area (A), the number of dots on the perimeter (n) and
the number of dots on the inside of the polygon (d).
2). A number line is written out on a piece of paper like the one below.
a). Edward cuts the paper every 2 numbers to make dominoes.
He then adds up each domino and makes a number pattern.i). What is the number pattern ? ii). What will the 6th domino add up to ?iii). What will the 10th domino add up to ? iv). What will the nth domino add up to ?b). Edward starts again, this time making dominoes with 3 numbers (trominoes).
He then adds up each tromino and makes a number pattern.i). What is the number pattern ? ii). What will the 5th tromino add up to ?iii). What will the 12th tromino add up to ? iv). What will the nth tromino add up to ?c). Investigate similar patterns making dominoes using 4, 5, 6..... numbers.
See if you can find an overall general formula.Try to explain why you got each set of number patterns.
3). Within the diagram below there are 3 triangles.
Find the number of triangles in each of the diagrams below.
Investigate the relationship between the number of lines across each triangle and thenumber of triangles within each diagram.
4). a). If we add 2 consecutive numbers we can make all these numbers :1 + 2 = 3, 2 + 3 = 5, 3 + 4 = 7, .....
Continue this pattern.From this pattern what is the
i). 6th number, ii). 10th number, iii). 20th number, iv). nth number ?b). If we add 3 consecutive numbers we can make all these numbers :
1 + 2 + 3 = 6, 2 + 3 + 4 = 9, 3 + 4 + 5 = 12, .....Continue this pattern.From this pattern what is the
i). 5th number, ii). 12th number, iii). 24th number, iv). nth number ?c). Repeat this investigation for 4, 5, 6.... consecutive numbers.
Look at the nth numbers for the different investigations, what is the pattern?Try to explain why we get each set of patterns.
5). In these puzzles you get the number in the circle by adding up the 2 numbers in the squareon either side of the circle.a). Consider the puzzle with just one circle.
Draw a table for different startnumbers (s) and end numbers (e).Find an equation that links them.Change the number in the circle, how does this change the equation?
b). The puzzle is now extended to 2 circles.Draw a table for different startnumbers (s) and end numbers (e).Find an equation that links them.Change the numbers in the circles. What is the relationship between the numbers inthe circles and the equation linking the start and end numbers ?
c). The puzzle is now extended to 3 circles.Draw a table for different startnumbers (s) and end numbers (e).Find an equation that links them.Change the numbers in the circles. What is the relationship between the numbers inthe circles and the equation linking the start and end numbers ?
d). Keep extending the number of circles in the puzzle.Find a relationship between the start and end numbers and the numbers in the circles.
5). a). Complete the table below for y = x2 + 2x for the values -6 ≤ x ≤ 4, then plot the graph.
x -6 -5 -4 -3 -2 -1 0 1 2 3 4x2 36 1
+2x -12 -10 -4 6y 24
b). Use the graph to find the value of y when x isi). 2.5 ii). -0.5 iii). -4.6
c). Use the graph to find the values of x when y isi). 20 ii). 5 iii). -0.5
6). a). Complete the table below for y = x2 - 2x for the values -4 ≤ x ≤ 6, then plot the graph.
x -4 -3 -2 -1 0 1 2 3 4 5 6y 24 8 3
Hint: to substitute -4 in to the equation use your calculator like this,4 +/- x2 - 2 x 4 +/- = 24.
On some calculators you may need to press "shift" or "inv" to access the x2 key.b). Use the graph to find the value of y when x is i). 3.5 ii). -2.8 iii). 4.8c). Use the graph to find the values of x when y is i). 20 ii). 2 iii). 10
7). a). Complete the table below for y = x2 + 3x for the values -6 ≤ x ≤ 3, then plot the graph.
x -6 -5 -4 -3 -2 -1 0 1 2 3y 10 -2 0
b). Use the graph to find the value of y when x is i). -5.2 ii). 2.2 iii). -0.4c). Use the graph to find the values of x when y is i). 8 ii). -1.5 iii). 2
8). a). Complete the table below for y = x2 - 5x for the values -2 ≤ x ≤ 7, then plot the graph.
x -2 -1 0 1 2 3 4 5 6 7y 14 -6
b). Use the graph to find the value of y when x is i). 0.6 ii). 2.5 iii). -1.8c). Use the graph to find the values of x when y is i). 8 ii). -5 iii). 4
9). a). Complete the table below for y = x2 - 3x + 2 for the values -3 ≤ x ≤ 6, then plot the graph.
x -3 -2 -1 0 1 2 3 4 5 6y 12 0
b). Use the graph to find the value of y when x is i). 1.4 ii). -2.2 iii). 3.4c). Use the graph to find the values of x when y is i). 10 ii). 18 iii). 1
10). a). Complete the table below for y = x2 + 2x - 6 for the values -6 ≤ x ≤ 4, then plot the graph.
x -6 -5 -4 -3 -2 -1 0 1 2 3 4y 2 -7
b). Use the graph to find the value of y when x is i). -5.8 ii). -0.4 iii). 1.5c). Use the graph to find the values of x when y is i). 10 ii). -4 iii). 5
1). Use trial and improvement to find the positive solution of the following to 1 d.p. ,
a). x2 = 15 b). x2 = 56 c). x2 = 6 d). x2 = 47
2). Use trial and improvement to find the positive solution of the following to 2 d.p. ,
a). x2 = 37 b). x2 = 110 c). x2 = 94 d). x2 = 24
3). x2 + x = 5 has two solutions.a). the positive solution lies between 1 and 2. Find this to 1 d.p..b). the negative solution lies between -2 and -3. Find this to 1 d.p..
4). x2 + x = 51 has two solutions.a). the positive solution lies between 6 and 7. Find this to 1 d.p..b). the negative solution lies between -7 and -8. Find this to 1 d.p..
5). x2 + x = 35 has two solutions.a). the positive solution lies between 5 and 6. Find this to 1 d.p..b). the negative solution lies between -6 and -7. Find this to 1 d.p..
6). x2 + 3x = 6 has two solutions.a). the positive solution lies between 1 and 2. Find this to 1 d.p..b). the negative solution lies between -4 and -5. Find this to 1 d.p..
7). x2 - 4x = 90 has two solutions.a). the positive solution lies between 11 and 12. Find this to 1 d.p..b). the negative solution lies between -7 and -8. Find this to 1 d.p..
8). x2 + 5x = 45 has two solutions.a). the positive solution lies between 4 and 5. Find this to 2 d.p..b). the negative solution lies between -9 and -10. Find this to 2 d.p..
9). x2 - 3x = 26 has two solutions.a). the positive solution lies between 6 and 7. Find this to 2 d.p..b). the negative solution lies between -3 and -4. Find this to 2 d.p..
10). x2 - 3x = 60 has two solutions.a). the positive solution lies between 9 and 10. Find this to 2 d.p..b). the negative solution lies between -6 and -7. Find this to 2 d.p..
11). 2x2 + x = 9 has two solutions.a). the positive solution lies between 1 and 2. Find this to 1 d.p..b). the negative solution lies between -2 and -3. Find this to 1 d.p..
12). 2x2 + x = 70 has two solutions.a). the positive solution lies between 5 and 6. Find this to 2 d.p..b). the negative solution lies between -6 and -7. Find this to 2 d.p..
13). 2x2 + 5x = 60 has two solutions.a). the positive solution lies between 4 and 5. Find this to 2 d.p..b). the negative solution lies between -6 and -7. Find this to 2 d.p..
14). x2 + x + 5 = 41 has two solutions.a). the positive solution lies between 5 and 6. Find this to 1 d.p..b). the negative solution lies between -6 and -7. Find this to 1 d.p..
15). x2 + x + 10 = 58 has two solutions.a). the positive solution lies between 6 and 7. Find this to 2 d.p..b). the negative solution lies between -7 and -8. Find this to 2 d.p..
16). x2 - x + 4 = 69 has two solutions.a). the positive solution lies between 8 and 9. Find this to 2 d.p..b). the negative solution lies between -7 and -8. Find this to 2 d.p..
17). x2 - 4x + 12 = 27 has two solutions.a). the positive solution lies between 6 and 7. Find this to 2 d.p..b). the negative solution lies between -2 and -3. Find this to 2 d.p..
18). x2 - 3x + 8 = 50 has two solutions.a). the positive solution lies between 8 and 9. Find this to 2 d.p..b). the negative solution lies between -5 and -6. Find this to 2 d.p..
Other Equations.
1). Use trial and improvement to find the positive solution of the following to 1 d.p. ,
a). x3 = 14 b). x3 = 6 c). x3 = 40 d). x3 = 90
2). Use trial and improvement to find the positive solution of the following to 2 d.p. ,
a). x3 = 66 b). x3 = 30 c). x3 = 110 d). x3 = 63
3). Find the positive, whole number solution to the following,
When people become pen pals they send letters to each other.
Class 9 C decide to form a pen pal group. They must send a letter to every one in the group.
1). The group is not popular to start with, only Pete and Julie join.How many letters do they send in total ?
2). Next Charlotte joins Pete and Julie in the group.How many letters are now sent in total ?
3). As the group gets bigger, explore how many letters are sent.Copy and complete the table below.
People, p 1 2 3 4 5 6No. of Letters sent, n 0 2 6
4). Continue this pattern up to 10 people.
5). a). Look at the consecutive numbers in the people row and at the number of letters sent.Write down the link.
b). Hence, find a formula that links n and p.
6). Use your formula to find the number of letters sent bya). 12, b). 20, c). 35, d). 42 people.
7). Pete then has a brilliant idea. They decide to have a meeting.Again it is very slow to take off. Only Julie and Pete attend the first meeting.At the meeting they shake hands. How many handshakes are there ?
8). Charlotte joins Julie and Pete at the second meeting.They all shake hands.How many handshakes are there at this meeting ?
9). As each meeting is held another person joins in.Investigate the number of handshakes at each meeting.Copy and complete the table below.
People, p 1 2 3 4 5 6No. of handshakes, h 0 1 3
10). Continue this pattern up to 10 people.
11). The number of handshakes are special numbers. What are they called ?
12). a). Look at the numbers in the "number of letters" table and comparethem to the "number of handshakes". What connection do you notice ?
b). Hence, write a formula that links h and p.
13). Use your formula to find how many handshakes at meetings attended bya). 14, b). 26, c). 41, d). 50 people.
Circles.This circle has 3 points marked on its circumference.Each is connected by a straight line.It takes 3 straight lines to connect 3 points on the circumference.Investigate the number of points drawn on the circumference of a circleand the number of lines needed to connect them all together.Then copy and complete the table below.
Points, p 1 2 3 4 5 6No. of Lines , l 3
Compare this to the table of handshakes.Hence find a formula that links p and l.Use your formula to find how many lines are needed when there are
a). 9, b). 13, c). 24, d). 35 points.
Roads.Three straight roads are built.There are several ways they could be set out.In the first diagram they are all parallel and theroads don't intersect (cross).In the second diagram 2 of the roads are parallel.Here there are 2 intersections.What is the most number of intersections when 3 roads are built ?Investigate the maximum number of road intersections for different numbers of roads.Then copy and complete the table below.
Roads, r 1 2 3 4 5 6Intersections , i
Compare this to the tables of "handshakes" and "number of lines".Hence find a formula that links r and i.Use your formula to find how many lines are needed when there are
a). 8, b). 16, c). 27, d). 37 roads.
House of Cards.A 3 storey house of cards is built as in the diagram.Investigate the number of cards needed to complete houseswith different numbers of storeys.Then copy and complete the table below.
Storeys, s 1 2 3 4 5 6No. of cards , c
Find a formula that links s and c.( Hint. Compare this to the tables in previous questions.
Part of this formula is not storey x storey before it ).
Use your formula to find how many cards are needed when there area). 11, b). 15, c). 29, d). 43 storeys.
Page 10.9). a). 2v - 5 b). 2v - 5 = 27 c). 1610). a). 3f + 9 b). 3f + 9 = 42 c). 1111). a). q/2 + 5 b). q/2 + 5 = 14 c). 1812). a). 4x+ 6 b). 4x + 6 = 34 c). 7 and 10 m13). a). 6y + 10 b). 6y + 10 = 52 c). 7 and 19 m14). a). 3f + 9 b). 3f + 9 = 51 c). 14, 18 and 19.15). a). 10a = 4a + 12 b). 20 m c). 4 x 6 m and 2 x 8 m.16). a). 10p + 6 = 6p + 22 b). 46 m c). 9 x 14 m and 11 x 12 m.
Page 11. Algebraic Multiplication Grids 1.Complete answer grid given, read from left to right.1). a c 4b 2a 3c 3ac 3c2 12bc 6ac a a2 ac 4ab 2a2 2b 2ab 2bc 8b2 4ab b
ab bc 4b2 2ab2). 6u 4w 7v u2 5w 30uw 20w2 35vw 5u2w 2u 12u2 8uw 14uv 2u3 w 6uw
9). y = x + 2 10). y = 4x - 3 11). y = 5x 12). y = 4x - 113). y = 7x + 2 14). y = 6x - 2 15). b = 5a + 6 16). d = 5c - 317). f = 4e - 2 18). k = 8j + 3 19). v = 13u + 4 20). q = 9p - 621). s = 2r - 3 22). u = 3t - 5 23). r = p - 3 24). x = 4w - 525). d = 3c - 6 26). t = 2x - 5 27). q = 3p - 9 28). p = m - 429). f = 2j - 7 30). j = 4k - 11 31). t = m + 5 32). y = 2x - 5
Page 26.33). s = 3p + 2 34). f = 6d + 1 35). j = 5h - 4 36). r = 3g - 3
B. 1). t = z/2 + 4 2). p = m/
2 + 2.5 3). s = a/
24). b = z/
2 - 1
5). w = v/4 + 1 6). p = c/
5 - 2 7). f = k/
2 + 6 8). d = 3n/
4 - 2
9). m = x/4 + 3 10). p = 3e/
4 - 2 11). g = -2h + 12 12). h = -f + 8
13). t = -2j + 6 14). k = -3e + 10 15). m = -2d + 4 16). z = -3y + 3317). p = 3s - 6 18). q = 2c - 20 19). b = w/
2 + 17 20). v = -r + 11
21). v = -h/2 + 5 22). e = -p/
2 + 12 23). w = -g/
3 + 52/
324). d = -2t/
3 + 61/
3
25). q = 11k - 21 26). n = 7r - 77 27). f = -12h + 356 28). b = -j/7 + 84/
7
Page 27. Plotting Linear Functions.Through plotting the graphs correctly pupils should discover how each part of the equation affectsthe lines.1). d). Straight lines. e). parallel 2). d). Straight lines e). Parallel3). d). Pass through (0,1). 4). d). parallel 5). d). parallel6). d). Pass through (0,4) 7). d). parallel11). y = ax + b a- gradient, b- y intercept.
Page 28.20). d). x part is always 3. f). x part is always -5 h). y part is always 4
j). y part is always -7.21). k). i). y-axis ii). x-axis
Page 35. Plotting Simple Quadratics.These are calculated values. Values read from graphs will not be as accurate.1). c). i). 8.25 ii). 17.16 iii). 13.64