The vertical distance from a crest to the rest position ! I know I'm a little late but I just took this.
Answer:

Step-by-step explanation:

just multiply across
-k*7=-7k
5*5=25

hope this helps
ITS EASY AND IF YOU TRY YOU CAN FIND THE ANSWER JUST WORK HARD AND TRY
42 (1- 25/100) = 63/2 = 31.5 dollars
answer is $31.50
hope it helps