Assume f(x)=-x+8 and g(x)=8x+7. What is (f-g)(-4)

37

Step-by-step explanation:

(f - g)(x)  is the same as  

f(x) - g(x)

f(-4) - g(-4)

{ -(-4) + 8 }    -  { 8(-4) + 7 }

4 + 8 - { -32 + 7}

12 - ( -25 )

12 + 25

37

BTW, you can add, subtract, multiply and divide functions

(f - g)(x) = f(x) - g(x)

(f + g)(x) = f(x) + g(x)

(f * g)(x) = f(x) * g(x)

(f/g)(x) = f(x) ÷ g(x), as long as g(x) ≠ 0 (That would be undefined.)

Hope this is  :)

.25

step-by-step explanation: