Answer:
f(5) = 20
Explanation:
f(5) = 3(a+ 2) − 1
We put the 5 in for the variable a and solve.
f(5) = 3(5 + 2) - 1
f(5) = 3(7) - 1
f(5) = 21 - 1
So, the answer is f(5) = 20
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