Question

Help with function questions?

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Answer 1

Below

Explanation:

Question 2
`f(x)=x+9`
`g(x)=5x`
What this means is that for any value of x ie `x=1,2,3,...` you just replace the x with the number.

Here's an example
if `x=1`
then `f(x)=x+9` would equal to `f(1)=1+9=10`
and `g(x)=5x=5times1=5`

SO going back to the question
`f(3)+g(-3)`
=`3+9+5(-3)`
=`12-15`
=`-3` is the answer

Question 3
`g(x)-f(x)`
=`9x-(7x+3)`
=`9x-7x-3`
=`2x-3`

Question 4
`f(4)-g(2)`
=`(3(4)-3)-2(2)`
=`12-3-4`
=`5`

Hope this helps!