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Fynjy0 [20]
3 years ago
15

F(x)=7x+9 find f(6c-4) a.35c+9 b.42c+9 c.42c-19 d.42c-19

Mathematics
1 answer:
Lapatulllka [165]3 years ago
4 0
C & D Answer Choices Are The Same, Your Answer Is 42c-19

f(x) =  \: all \: x \: in \: (7x + 9)
f(x) = 7x + 9
f(6c - 4) = 7x + 9
*Distributive Property
f(6c - 4) = 7(6c - 4) + 9
f(6c - 4) = 42c - 28 + 9
f(6c - 4) = 42c - 19

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Answer:

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Step-by-step explanation:

La formula del perímetro de un rectángulo es:

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p = 2(a+b)

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entonces:

sustituyendo el valor de la segunda ecuación

p = 2((3b/4)+b)

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