Alex buys 2 1/2 pounds of grapes. He buys 1 1/4 times as many pounds of apples as grapes. How many pounds of apples does he buy?
2 answers:
Grapes = 2 1/2 pounds = 5/2 pounds
Apples = 1 1/4 times grapes = 5/4 times grapes
Apples = 5/4 * 5/2 = 25/8 pounds = 3 1/8 pounds
So if, <span>2 1/2 = 5/2 and 1 1/4 = 5/4,
then </span>5/2 * 5/4 = 5*5 / 2*4 <span>= 25/8 is simplified to 3 1/8 pounds.</span>
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Inversely proportional: z = k/r
k = 32 * 1.5 = 48
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8 = 48/r
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8r = 48
Divide by 8
r = 6
15/8 + 1/4
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= (15 + 2) /8
= 17/8
= 2 1/8. 2 whole number 1/8.
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