Chapter 4 Section 8 Use the Quadratic Formula In this assignment, you will be able to... 1.Solve a quadratic equation by using the quadratic formula. 2. Use quadratic formula to model object launched.
Jan 05, 2016
Chapter 4 Section 8Use the Quadratic Formula
In this assignment, you will be able to...
1.Solve a quadratic equation by using the quadratic formula.
2. Use quadratic formula to model object launched.
Solve the equation by using the quadratic formula.
1.)
Answer:
Original equation
Subtract 2 from both sidesa=1b=3c=-2 Find a, b and c
Plug in a, b and c into the quadratic formula.
Solve
or
or
Solve the equation by using the quadratic formula.
2.)
Answer:
Solve the equation by using the quadratic formula.
3.)
Answer:
Solve the equation by using the quadratic formula.
4.)
Answer: x=-1 or x=5
Solve the equation by using the quadratic formula.
5.)
Answer:
Solve the equation by using the quadratic formula.
6.)
Answer: x=2
Solve the equation by using the quadratic formula.
7.)
Answer:
Solve the equation by using the quadratic formula.
8.) Juggling. A juggler tosses a ball into the air. The ball leaves the juggler's hand 4 feet
above the ground and has an initial velocity of 40 feet per second. The juggler catches the ball when it falls back to the height of 3 feet. How long is the ball in the air? Use
the model launched formula
Answer: 2.5 seconds
Solve the equation by using the quadratic formula.
9.) Basketball. A basketball player passes the ball to a teammate. The ball leaves the
player's hand 5 feet above the ground and has an initial velocity of 55 feet per second.
The teammate catches the ball when it returns to a height of 5 feet. How long is
the ball in the air? Use the model launched formula
Answer: 3.4 seconds
Solve the equation by using the quadratic formula.
10.) Biology. The number S of ant species in Kyle Canyon, Nevada, can be modeled by
the function
where E is the elevation (in meters). Predict the elevation(s) at which you expect
to find 10 species of ants.
Answer:1141 meters , 2090 meters
11.)Find the minimum or maximum value of the
function
Answer: V(-3,15) Max value=15
12.) Solve the equation
by factoring.
Answer: x=5 or x=8