Question

Assume f(x) = -2x + 8 and g(x) = 3x. What is the value of (f + g)(-1)?

Answer 1

so you want (f+g)(-1)

(-2x+8+3x)(-1)
So that'd be
-x-8

Answer 2

correct btw remember P.E.M.D.A.S.

Answer 3

hmm you're not multiplying (f+g) with (-1)

Answer 4

(f+g)(-1) means add both function and then substitute x for -1

Answer 5

\[f(x)=-2x+8 ~~~~g(x)=3x\]\[f(x)+g(x) =(-2x+8)+(3x)\]
combine like terms
add the coefficient of the same variables
like `-2x+3x`
(-2+3)x=1x\[f(x)+g(x)=3x-2x+8= x+8\]
now replace x with `-1` and then simplify that would be the answer