Answer:
2a+7
Explanation:
Given the functions
f(a) = 2a-3
g(a) = a+5
We are to find fog(a)
fog = f(g(a))
f(g(a)) = f(a+5)
Replace a with a+5 in f(a)
f(a+5) = 2(a+5)-3
f(a+5) = 2a+10-3
f(a+5) = 2a+7
Hence (fog)(a) is 2a+7
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