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Brilliant_brown [7]
3 years ago
11

You are trying to recreate flubber because you are obsessed with that movie and you thought it was the coolest. you take 70% sli

me solution and some 40% slime solution to obtain 120 gallons of a 50% slime solution. how much of the 40% slime solution do you need to create your mixture?
a. 40

b. 80

c. 50

d. 70

can you help me solve?
Mathematics
1 answer:
german3 years ago
8 0

Let x be the amount (gal) of the 40% slime solution you end up using. You want to end up with 120 gal of the 50% solution, so that you would use 120-x gal of the 70% solution.

You want the final solution to consist of 50% slime, or 60 gal of slime. Each gal of the 40% solution contributes 0.4 gal of slime, while each gal of the 70% solution contributes 0.7 gal of slime. This means

0.4x+0.7(120-x)=0.5\cdot120=60

\implies0.4x+84-0.7x=60

\implies24=0.3x

\implies x=80

so the answer is B.

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