Question

A function is defined by f(x) = 5(2-x). What is f(–1)?
–5
5
15
53

Answer 1

Answer:e

Explanation:

f(x) = 5(2-x)

= 10 - 5x

For f(-1) = 10 - 5(-1)

= 10 + 5

= 15

Answer 2

15 because if you substitute -1 in for x then you have a double negative, that becomes positive and 2+1=3 and 3•5=15