Question

Find a. (f+g)(x) b. (f+g)(2).

f(x)=5x² -x-1, g(x)=x+4

a. (f+g)(x)=

b. (f+g)(2)=

The stopping distance d​ (in ft) of a car going v​ mi/h is given by d=v+0.05v² Since d=f(v), find f(40), f(2v), and f(80), using both f(v) and f(2v).

f(40)=

Simpify your answer

f(2v)=

Simplify your answer. Use integers or decimals for any numbers in the expression.

Use f(v) to find f(80)

f(80)=

Simplify your answer

Use f(2v) to find f(80)

f(80)=

Simplify your answer