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anonymous
 one year ago
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
anonymous
 one year ago
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

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Vocaloid i am your 200th fan the least u could do is help me out

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0a(x) = 3x  12 a((b(x)) = 3*b(x)  12 = 3(x9)  12

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0a(x) = 3x  12, right? a(b(x)) means replace "x" with b(x), so a(b(x)) = 3*b(x)  12 now, we know that b(x) = x  9, so we can replace "b(x)" with (x9), giving us a(b(x)) = 3(x9)12 distribute the 3 and simplify
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