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- 1. Multiple Choice
The height of a water balloon that is launched into the air is given by h(t) = -5x2+20x+25. When will the balloon explode on the ground?
5 seconds
1 second
2 seconds
3 seconds
- 2. Multiple Choice
The height of a water balloon that is launched into the air is given by h(t) = -5t2 + 40t + 2. From what height was the balloon released?
2 meters
5 meters
40 meters
20 meters
- 3. Multiple ChoiceIf a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation
h(t) = -16t2 +128t
When will the object reach its maximum height?4 ft0 seconds0 ft4 seconds - 4. Multiple ChoiceRafael drops a ball from a third-story window. This equation represents the approximate height, h, in meters, of the ball above the ground after it falls for t seconds.
h = -5t2 + 45
When is the ball at ground level?only at t = 0 secondsonly at t = 3 secondsonly at t = 9 secondsat both t = 0 seconds and t = 3 seconds - 5. Multiple ChoiceA soccer ball is kicked from the ground with an initial upward velocity of 90 feet per second. The equation h=-16t2 + 90t gives the height h of the ball after t seconds.
How many seconds will it take the ball to hit the ground?126.56 ft5.625 sec2.81 sec0 ft - 6. Multiple Choice
A dolphin jumps from the water at at initial velocity of 16 feet per second. The equation h = -8t2 + 16t models the dolphin's height at any given time, t. What is the maximum height the dolphin jumps?
1 foot
5 feet
7 feet
8 feet
12 feet
- 7. Multiple Choice
Your nephew is standing on his deck, which is 4 feet off the ground. He tosses his toy up into the air. The equation
h = -2t2 + 7t + c models the toy's height, h, from the ground at t seconds after he threw it. How high is the toy after 1 second?
2
4
9
10
15
- 8. Multiple Choice
An object in launched directly upward at 64 feet per second (ft/s) from a platform 80 feet high. Its height is represented by the equation
s(t) = –16t2 + 64t + 80
What will be the object's maximum height?
2 ft
80 ft
144 ft
64 ft
- 9. Multiple Choice
Which axis USUALLY represents Time?
x-axis
y-axis
t-axis
Time cannot be represented graphically
- 10. Multiple Choice
When asked to find "How long did it take to reach its maximum height" what feature of a parabola are you trying to find?
x-value of the vertex (AOS)
y-value of the vertex
X-intercepts
Y-intercept
- 11. Multiple Choice
When asked to find "From what height was the object launched?" what feature of a parabola are you trying to find?
x-value of the vertex (AOS)
y-value of the vertex
X-intercepts
Y-intercept
- 12. Multiple Choice
When asked to find "What was the Maximum Height reached by the object?" what feature of a parabola are you trying to find?
x-value of the vertex (AOS)
y-value of the vertex
X-intercepts
Y-intercept
- 13. Multiple Choice
When asked to find "How long did it take for the object to hit the ground?" what feature of a parabola are you trying to find?
x-value of the vertex (AOS)
y-value of the vertex
X-intercepts
Y-intercept
- 14. Multiple Choice
Which quadratic equation models the parabola shown?
y = (x-2)(x-5)
y = (x+2)(x+5)
y = -(x+2)(x+5)
y = -(x-2)(x-5)
- 15. Multiple Choice
Which equation matches the x-intercepts x=5,-7 ?
(x+5)(x-7)=0
(x-5)(x+7)=0
(x+5)(x+7)=0
(x-5)(x-7)=0
- 16. Multiple Choice
what is the variable that willl be "eliminated"?
5x - 4y = 11
5x + 4y = -14
x variable
y variables
both variables
- 17. Multiple Choice
2x - 6y = 20
2x + 5y = -11
what would the top equation become when you multiply everything by -1?
2x - 6y = 20
-2x - 6y = -20
-2x + 6y = 20
-2x + 6y = -20
- 18. Multiple Choice
what do you need to multiply the top equation by to make a zero pair:
5x - 2y = 11
-10x + 3y = -4
5
-1
2
-2
- 19. Multiple Choice
Solve the system:
x + 6y = 17
x - 3y = 8
(5, 2)
(11, 1)
(1, 11)
no solution
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