SOLUTION: If f(x) = 8 � 10x and g(x) = 5x + 4, what is the value of (fg)(�2)?

SOLUTION: If f(x) = 8 � 10x and g(x) = 5x + 4, what is the value of (fg)(�2)?

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Question 882638: If f(x) = 8 � 10x and g(x) = 5x + 4, what is the value of (fg)(�2)?
Answer by Leaf W.(135) (Show Source): You can put this solution on YOUR website!
(fg)(-2) essentially means f(g(-2)) -- in other words, you need to find g(-2), and then plug that value into the function f.
*
g(-2) = 5(-2) + 4 = -10 + 4 = -6
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f(g(-2)) = f(-6) = 8 - 10(-6) = 8 + 60 = 68
*
Thus, the value of (fg)(-2) is 68.
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