Mutt is saving money to buy some plaid shirts. He is going to walk a neighbor's dog for $6 per hour and wash cars for $7.50 per hour. He can work no more than 15 hours
this week. He wants to buy $75 worth of shirts.

you have to find the same variables -3n - 5n so this would be -3n +(-5n) which equals -9n

d. 5

step-by-step explanation:

f(x) + n - shift a graph n units up

f(x) - n - shift a graph n units down

f(x + n) - shift a graph n units to the left

f(x - n) - shift a graph n units to the right

on the picture we can see:

the graph g(x) was made by shifting the graph f(x), 5 units to the left.

therefore g(x) = f(x + 5) → k = 5

look at the picture.