Given f (x) = 10x+5 and g (x) = 3x+6 then what is (f+g) (-1)) ?

-13x-11

Step-by-step explanation:

The function f (x) plus the other function g (x) is just another way of saying (10x+5) + (3x+6) which would give you 13x + 11. The next part is asking you to multiply 13x+11 by - 1 which would give you the answer - 13x - 11