Answer:
15%
Step-by-step explanation:
pretty sure thats right
Answer:
547.125
Step-by-step explanation:
The answer would be A) $79.20
(220*.4).9 as 60 percent off means that the product is only 40 percent of its original value, furthermore, we multiply the entire thing by .9
Answer: Choice C) 
This is the same as saying 
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Explanation:
First get everything to one side
x^2 + 13 = 8x + 37
x^2 + 13 - 8x - 37 = 0
x^2 - 8x - 24 = 0
Here we have a quadratic in the form ax^2+bx+c = 0
Note how a = 1, b = -8, c = -24
Those values are plugged into the quadratic formula below

This shows the answer is choice C.
The plus minus breaks down that equation these two solutions

155 meters is the answer. You have to divide 620 by 4.