Question

1. let f(x)=-5x-4 and g(x)=6x-7. find f(x)+g(x)
A. -11x+3
B. x+3
C. -11x-11
D. x-11

2. let f(x)=3x+2 and g(x)=6x-7. find f(x)-g(x)
A. 3x-9
B. -3x+9
C. -3x-5
D. 2x-1

3. let f(x)=-5+3 and g(x)=6x-2. find f*g and its domain
A. -30x^2+28x-6; all real numbers except x=1/3
B. -15x^2-8x-12; all real numbers except x=3/5
C. -30x^2+28x-6; all real numbers
D. -15x^2-8x-12; all real numbers

Answer 1

-5x-4 + 6x-7 = x-11
1. D

Answer 2

first one is simply adding the 2 then adding like terms