Find x if f(x) = 2x + 7 and f(x) = -1.

5
-3
-4

x = -4

Step-by-step explanation:

Start by replacing f(x) with -1.

-1 = 2x + 7

Then subtract 7 on both sides of the equation and add like terms.

-8 = 2x

Then divide 2 on both sides of the equation and solve.

-4 = x

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2