Question

IF(x)=3x+7, Find the image of 5
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Answer 1

The answer is 22.
You substitute 5 where there is an x.
(3 X 5) + 7
15 + 7 = 22
f(5) = 22

Answer 2

f(5) = 22

Explanation:

Substitute x = 5 into f(x) for image , that is

f(5) = 3(5) + 7 = 15 + 7 = 22