Evaluate. Find (f ∙ g)(3) given f(x) = x - 5 and g(x) = -4x2 + 11x + 5. A.-248 B.16 C.-94 D,-4

asked Dec 7, 2021 37.5k views

1 vote

Evaluate.

Find (f ∙ g)(3) given f(x) = x - 5 and g(x) = -4x2 + 11x + 5.

A.-248

B.16

C.-94

D,-4

by Laudy

5.4k points

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3 votes

Answer: D) -4

Explanation:

$f(x)=x-5\\g(x)=-4x^2+11x+5$

$(f*g)(3)=(x-5)(-4x^2+11x+5)\\(f*g)(3)=(3-5)(-4(3)^2+11(3)+5)\\(f*g)(3)=(-2)(-4*9+33+5)\\(f*g)(3)=(-2)(-36+38)\\(f*g)(3)=(-2)(2)\\(f*g)(3)=-4$

Jack Wilson answered Dec 9, 2021

5.3k points

3 votes

B because I did the math and it’s b

Jeand answered Dec 11, 2021

by Jeand

5.2k points

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