Question

let $f(x) = 3x - 5$. what is $f(4)$? a. 7 b. 9 c. 12 d. 17 #2 let $g(x) = x^2 + 2x$. what is $g(-3)$? a. 3 b. -3 c. 15 d. -15 #3 let $h(x) = \frac{x}{2} + 6$. what is $h(8)$? a. 8 b. 10 c. 12 d. 14

Explanation:

Step1: Substitute $x=4$ into $f(x)$

$f(4)=3(4)-5$

Step2: Calculate the value

$f(4)=12-5=7$

Step1: Substitute $x=-3$ into $g(x)$

$g(-3)=(-3)^2+2(-3)$

Step2: Calculate the value

$g(-3)=9-6=3$

Step1: Substitute $x=8$ into $h(x)$

$h(8)=\frac{8}{2}+6$

Step2: Calculate the value

$h(8)=4+6=10$

Answer:

1. A. 7
2. A. 3
3. B. 10