Question

Some On PLEASE help me understand!!! Find f(4). Put your final answer in function form! f(x)=3x+5 g(x) = 2x^2-4 h(x) = -3x-9

Answer 1

f(4) = 17

Explanation:

Given function f(x), when you want to find f(4) you just put 4 for every x in the equation of the function.

f(x) = 3x + 5 ⇒ f(4) = 3(4) + 5 = 12 + 5 = 17

g(x) = 2x² - 4 ⇒ g(4) = 2(4)² - 4 = 2•16 - 4 = 32 - 4 = 28

h(x) = -3x - 9 ⇒ h(4) = -3(4) - 9 = -12 - 9 = -21

Answer 2

f(4)=3(4)+5
12+5
f(4)=17