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choli [55]
3 years ago
11

I have $3.35 in quarters and dimes. if i have 23 coins in all, find the number of quarters and dimes

Mathematics
1 answer:
miskamm [114]3 years ago
3 0
16 dimes and 7 quarters 
I hope this helps :)
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schepotkina [342]

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Here's the solution using the quadratic formula:

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There are many ways to check your answer. One of them is to look at the given quadratic, which has no changes of sign in its coefficients. (They are all positive.) That means there can be no positive real roots, so already you know that x=0.5 won't work.

Also, the constant in the quadratic is the product of the roots, For your roots, their product is -7/4, so even multiplying by 4 (the leading coefficient in the given quadratic), you don't get anything like 20.

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