SOLUTION: given r(x)= 2x-1 and g(x)=-1-2x. determine the value of (fg)(-2) a.-15 b.15 c.9 d.-9

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: given r(x)= 2x-1 and g(x)=-1-2x. determine the value of (fg)(-2) a.-15 b.15 c.9 d.-9      Log On


   

Question 131297: given r(x)= 2x-1 and g(x)=-1-2x.
determine the value of (fg)(-2)
a.-15
b.15
c.9
d.-9
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
f(g(-2))
First find g(-2).
g%28x%29=-1-2x
g%28-2%29=-1-2%28-2%29
g%28-2%29=-1%2B4
g%28-2%29=3
Now use this value.
f%28g%28-2%29%29=f%283%29
f%28x%29=2x-1
f%283%29=2%283%29-1
f%283%29=6-1
f%283%29=5
f%28g%28-2%29%29=5
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