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  1. Given the functions a(x) = 3x − 12 and b(x) = x − 9, solve a[b(x)] and select the correct answer below.

a[b(x)] = 3x2 − 21

a[b(x)] = 3x2 − 39

a[b(x)] = 3x − 21

a[b(x)] = 3x − 39

Verified Answer :

I think the answer is A: a[b(x)] = 3x2-21 because if you make this whole expression into an equation then solve x, you will get answer A. Hope this helps! :)

Answer:

a[b(x)] = 3x − 39

Step-by-step explanation:

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