Question

Let f(x) = -­2x ­- 7 and g(x) = ­-4x + 3. Find (f o g)(-­5)

Answer 1

The answer is:  [A]:  " -53 " .
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Explanation:
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Given:  

" Let f(x) = -­2x ­− 7 and g(x) = ­-4x + 3.  Find (f o g)(-­5) " ;
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First, find g(-5) .   g(x) = -4x + 3.  

g(-5) = -4*(-5)  + 3 = 20 + 3 = 23 ;
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Now find f (g(-5) to get the answer; that is f(23); 
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  Find f(23).  f(x) = -2x − 7 .  
 
  f(23) = (-2*23) − 7 = -46 − 7 = -53 ; which is "Answer choice: [A]" .
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