Haleybellc Haleybellc

04-06-2017
Mathematics

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

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bc00014 bc00014

04-06-2017

We know f(x)=5x+1. Plug in f(x) in the g(x) function.
We get [tex]g(x)=2(5x+1)+5[/tex] Distribute the 2 to 5x and 1.
[tex]g(x)=10x+2+5[/tex]
Simplify to get [tex]g(x)=10x+7[/tex]
Now, we plug in -1 for x.
[tex]g(-1)=10(-1)+7[/tex]
[tex]g(-1)=-10+7[/tex]
[tex]g(-1)=-3[/tex]

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