For each function, what is the output of the given input?
for f(x) = 4x+7, find f(4)

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x