Question

F(x) = 2x - 3 and g(x) = -5x + 2. Find f(3) + (8) pace: +

Answer 1

Given

`f\mleft(x\mright)=2x-3`
`g\mleft(x\mright)=-5x+2`

Find

`f\mleft(3\mright)+g\mleft(8\mright)`

First we substitute x=3 into f(x):

`\begin{gathered} f\mleft(3\mright)=2*3-3=6-3=3 \\ f\mleft(3\mright)=3 \end{gathered}`

Now find g(8):

`g\mleft(8\mright)=-5*8+2=-40+2=-38`

Now find

`\begin{gathered} f\mleft(3\mright)+g\mleft(8\mright)=3-38=-35 \\ f\mleft(3\mright)+g\mleft(8\mright)=-35 \end{gathered}`

f(3) + g(8) = -35