Question

Suppose that the functions r and s are defined for all real numbers x as follows.
HELP PLEASE

Answer 1

-x-3, 7x-3, -15

Explanation:

For first 2 just add/subtract their equations. For the last one (r.s)(-1) is the same as r(s(-1)) so s(-1)=4(-1)=-4 and r(-4)=3(-4)-3=-12-3=-15