40x+8x^2=0 can be solved for x (there are two solutions):
Divide all 3 terms by the greatest common multiple (which is 8x):
40x+8x^2=0
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8x 8x
5 + x = 0 produces the root x = - 5.
Setting 8x = 0 and solving for x produces the root x = 0.
Be certain to check these results. substitute x = -5 into 40x+8x^2=0. Is the resulting equation true or false? Next, subs. x=-5 into 40x+8x^2=0. Is the resulting equation true or false?
15 cookies burned because if you Turn

into a decimal then multiply it by 20 you get 15 and thats your answer.
The girls are closer. Her feet are 1/2 the distance away from the surface pool, the boys are 3/4 away.
20 didn't do it for this one.
Answer:
Regular peanut butter - .23
Family Size Peanut Butter - .15