Question

What is the value of 2g(-1)?

f(x) = 4x + 10; g(x) = 2x - 5

2g(-1) =

Answer 1

-14

Explanation:

Put -1 where x is in the definition of g(x) and do the arithmetic.

2g(-1) = 2(2·(-1) -5) = 2(-2-5) = 2(-7) = -14