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netineya [11]
2 years ago
5

Calvin is mixing colored gravel for the bottom of his fish tank. He mixes 12 pounds of blue gravel with 3 pounds of purple grave

l.
How much blue gravel is used per pound of purple gravel?

A.3 pounds
B.4 pounds
c.9 pounds
D.15 pounds
Mathematics
1 answer:
Flura [38]2 years ago
8 0

Answer:

B.4

Step-by-step explanation:

I did 12 divided by 3 = 4

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Answer : 96

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x is the higher grade and y is the lower grade

We solve the first equation for y

x - y = 16

-y = 16 -x ( divide each term by -1)

y = -16 + x

Now substitute y in second equation

1/8 x + 1/2 ( -16 + x ) = 52

1/8x - 8 + 1/2 x = 52

1/8x + 1/2x - 8 = 52

Take common denominator to combine fractions

1/8x + 4/8x -8 = 52

5/8x - 8 = 52

Add 8 on both sides

5/8x = 60

Multiply both sides by 8/5

x = 96

We know x is the higher grade

96 is the higher grade of Jose’s two tests.

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3 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
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