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DaniilM [7]
3 years ago
8

Which equation shows a correct evaluation of (mn)(4)?

Mathematics
1 answer:
yawa3891 [41]3 years ago
7 0

Answer:

(mn)(x) =8(4^2) +34(4) - 55

Step-by-step explanation:

Given

m(x) = 4x - 5

n(x) = 2x + 11

Required

What is (mn)(4)?

In functions:

(mn)(x) = m(x) * n(x)

Substitute values for m(x) and n(x)

(mn)(x) = (4x - 5)(2x + 11)

Substitute 4 for x

(mn)(x) = (4*4 - 5)(2*4 + 11)

(mn)(x) = (4^2 - 5)(8 + 11)

(mn)(x) =8(4^2) - 8*5 + 11(4^2) - 11 * 5

(mn)(x) =8(4^2) - 40 + 176 - 11 * 5

(mn)(x) =8(4^2) +136 - 55

(mn)(x) =8(4^2) +34(4) - 55

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