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skad [1K]
2 years ago
7

Keesha has 10 more quarters than dimes, which, together, total $11.25. How many coins does she have in quarters and dimes?​

Mathematics
1 answer:
Rom4ik [11]2 years ago
6 0

Assume Keesha has d dimes, so she has d + 10 quarters

Total money Keesha has is (d+10)*.25 + d*.1 = 11.25

or 0.35d + 2.5 = 11.25

Solving for d , d = 25

So Keesha has 25 dimes and 35 quarters, total of 60 coins

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We have y = -0.9x^2 + 76x - 250 which is in the form y = ax^2+bx+c

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Let's plug in x values around x = 42

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y = -0.9(41)^2 + 76(41) - 250

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