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eduard
2 years ago
8

Kala received a $70 gift card for a coffee store. She used it in buying some coffee that cost $8.58 per pound. After buying the

coffee, she had 18.52 left on her card. How many pounds of coffee did she buy?
Mathematics
1 answer:
Snezhnost [94]2 years ago
8 0
She bought 6 pounds of coffee. 6 x 8.58 = 51.48. If you add the 18.52 to 51.48 you would get the original $70 she had on the gift card
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Twice the difference of 3x and y increased by 5 times the sum of x and 2y
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The answer is 2(3x-y)+5(x+2y).
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Rina is making a nut mixture to sell at the local farmers' market. She mixes 6 pounds of pecans with a nut mixture that is 70% p
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So the best way to do these is concentration1 (%) × volume1 = concentration2 × volume2
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100%×6 + 70%×v2 = 82%×(6+v2)
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6 + .7v2 = .82 (6+v2)
6 + .7v2 = 4.92 + .82v2
6 + .7v2 -.7v2 = 4.92 + .82v2 -.7v2
6 = 4.92 + .12v2
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that's only v2!!!

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