 Practice with Evaluating Functions Terms of Use    Contact Person: Donna Roberts  Directions: Read carefully. Choose the best answers.

1.
Given f (x) = x2 + 3x + 4, find f (-4). Choose:
 0 4 8 12

2.
Which expression represents f (3a) when f (x) = | 2x2 - 3x | ?

Choose:
 18a2 - 9a 6a(a - 1) | 9a(2a - 1) | | 3a(3a - 2) |

3.
Given f (x) = x2 and h(x) = 4x, which expression represents g(x) when g(x) is defined as:  Choose:
 3x2 4x3 6x2 8x3

4.
Given , find m(2a + 1).

Choose:    5.
Given f (x) = 3x2 - 2x, express f (x + h). Choose:
 3x2 + 3h2 - 2x - 2h 3x2 + 2xh + h2 - 2x - 2h 3x2 + 6xh + 3h2 - 2x - 2h 3x2 + 6xh + 3h2 - 2x + 2h

6.
Given h(x) = x3 and k(x) = x + 3, find . Assume k(a) ≠ 0.

Choose:
 (a3 + 27) / (a + 3) (a + 3)3 / a a3 + 9a2 + 27a+ 24 a2 + 6a + 9

7.
If m(x) = | 4 - x | and p(x) = x + 2, express
t(3a + 2) when t(x) = 4m(x) - 2p(x). Choose:
 4 | 6 - 3a | - 6a - 8 4 | 6 - 3a | - 6a + 8 4 | 3a - 2 | - 6a + 8 4 | 2 - 3a | - 6a - 8

8.
Given: Find: f (-5) and f (2.5).

Choose:
 -13 and -1.25 40 and 7 10 and 9.5 40 and 9.5

9.
Given: Express . Choose:
 2x + h + 2 x2 + 2xh + h2 + 2x + 2h 2xh + h2 + 2h 2xh + h2 + 4x + 2h

10.
Given f (x) = 2-x, express f (-(x + 1)) • f (-3x).

Choose:
 2 x + 1 + 23x 2 4x - 1 2 4x + 1 2 3x - 1 NOTE: The re-posting of materials (in part or whole) from this site to the Internet is copyright violation and is not considered "fair use" for educators. Please read the "Terms of Use".