Question

3. A function is shown.
f(x)= 3 (-2x + 7)
What is the numerical value of f (-7)?

Answer 1

f(-7) = 63

Explanation:

f(x) = 3(-2x + 7)

f(-7) = 3(-2(-7) + 7)

f(-7) = 3 × (-2 × -7 + 7)

(-2 × -7 = 14

= 14 + 7

= 21)

f(-7) = 3 × 21

f(-7) = 63