10 Questions
| Attempts: 287

Questions and Answers

- 1.Which shows the quadratic function expressed in factored form? f(x) = 2x
^{2}+ 9x – 5- A.
(2x + 5)(x – 1)

- B.
(2x – 1)(x + 5)

- C.
(2x + 1)(x + 5)

- D.
(2x – 1)(x – 5)

- 2.The height of a crab h(t) in meters, dropped by a seagull to the rocks below, is given by the function h(t) = –5t
^{2}+ 20, where t is the time, in seconds, after it is released. What are the zeros of the function?- A.
(–5, 0) and (20, 0)

- B.
(2, 0) and (0, 0)

- C.
(–2, 0) and (20, 0)

- D.
(–5, 0) and (4, 0)

- 3.What is the axis of symmetry for the function –x
^{2}+ 7x + 30- A.
X = –3

- B.
X = 3.5

- C.
X = 6.5

- D.
X = 10

- 4.A volleyball is hit straight upward. The graph shows its height, h(t), in meters, at time t. Which is the function in a factored form that estimates the height of the volleyball at any given time?
- A.
X(x – 2)

- B.
–5x(x + 2)

- C.
–5(x – 2)

- D.
–5x(x – 2)

- 5.What is the y–intercept of the quadratic function f(x) = (2x + 4)(x – 3)?
- A.
(0, –12)

- B.
(0, 3)

- C.
(0, –2)

- D.
(0, 12)

- 6.A rocket is shot into the air. The height of the rocket is modeled by the function h(t) = –5t
^{2}+ 45t, where h(t) is the height in meters and t is the time in seconds. When will the rocket hit the ground?- A.
4.5 sec

- B.
5 sec

- C.
9 sec

- D.
45 sec

- 7.What are the coordinates of the vertex of f(x) = 2x
^{2}– 6x – 20?- A.
(–2, 5)

- B.
(1.5, –24.5)

- C.
(–2, –24)

- D.
(5, 0)

- 8.A rock is thrown into the river from a bridge that is 20 meters high. The table shows its height, h(t), at time t. Determine a function, in factored form, that estimates the height of the rock at any given time.
- A.
5(x+1)(x–4)

- B.
–5(x–1)(x+4)

- C.
–5(x+0)(x+4)

- D.
–5(x+1)(x–4)

- 9.Which is the graph of the function g(x) = (2x – 1)(x – 5)?
- A.
Graph A

- B.
Graph B

- C.
Graph C

- D.
Graph D

- 10.A fountain shoots water from a muzzle at its top. The function f(x) = –5t
^{2}+ 10t + 15 describes the height of the water h(t) in meters, t seconds after it leaves the nozzle. What is the maximum height of the water spout?- A.
1m

- B.
3m

- C.
15m

- D.
20m

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