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Aleks [24]
3 years ago
9

Mr. Haney has 11 coins in dimes and quarters. The value of his coins is $2.15. how many dimes does he have?

Mathematics
1 answer:
Anna11 [10]3 years ago
4 0

Answer:

4 dimes

Step-by-step explanation:

d+q=11  

10d+25q=215

15d=11(25)-215=60

d=60/15=4

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Read 2 more answers
What value should be added to the expression to create a perfect square? x^2 - 20x
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To complete the square:
we take the coefficient ox "x" (which in this problem is -20)
we divide it by 2
square that number
then add it to both sides of the equation

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then we add 100 to both sides of the equation:
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******************************************************
To get the roots of the equation, we take the square root of both sides:
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(x-10) = square root (10)
x-10 = <span> <span> <span> 3.1622776602 </span> </span> </span>
x1 = <span> <span> <span> 13.1622776602 </span>
and don't forget that square root of 10 also equals  </span></span><span><span><span> -3.1622776602 </span> </span> </span>
x2 = 10 -<span> <span> <span> 3.1622776602
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