Answer:
(f+g) (x) = 8x + 7
Step-by-step explanation:
Write out the two given functions in a column:
f(x) = 3x + 10x
+ g(x) = +5x - 3 find (f+g) (x) by adding together like terms
f(x) = 3x + 10x
+ g(x) = +5x - 3
--------- -----------
(f+g) (x) = 8x + 7
