Verify the identity.
1/1 − sin^2(y)
= 1 + tan^2(y)
Use a Pythagorean Identity

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