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If f(x)=5x+1 and g(x)=2f(x)+5 then g(-1)=

If f(x)=5x+1 and g(x)=2f(x)+5 then g(-1)=
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If f(x)=5x+1 and g(x)=2f(x)+5 then g(-1)=

User Kaushal Sachan
by
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1 Answer

7 votes
We know f(x)=5x+1. Plug in f(x) in the g(x) function.
We get
g(x)=2(5x+1)+5 Distribute the 2 to 5x and 1.

g(x)=10x+2+5
Simplify to get
g(x)=10x+7
Now, we plug in -1 for x.

g(-1)=10(-1)+7

g(-1)=-10+7

g(-1)=-3
User Totic
by
8.9k points
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