PLEASE HELP I NEED AN ANSWER QUICK

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Landon wrote that 3−2.6=4. which statement about his answer is true?