HELP 1.Find f(4) if f(x) = (1/2)x + 13

2.Find f(5) if f(x) = (3/5)x - 10

3.Find f(-1) if f(x) = x2 + 7

4.Find f(2) if f(x) = 3x3 -12x2

15, - 7, 8, - 24

Step-by-step explanation:

1

f(4) = × 4 + 13 = 2 + 13 = 15

2

f(5) = × 5 - 10 = 3 - 10 = - 7

3

f(- 1) = (- 1)² + 7 = 1 + 7 = 8

4

f(2) = 3(2)³ - 12(2)² = 3(8) - 12(4) = 24 - 48 = - 24

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step-by-step explanation:

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