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Bruce has $5.15 in dimes and quarters. He has 8 more quarters than dimes. How many quarters does he have?

...

Yeah, I suck at US currency.

 

I've already know one part of the problem

10c+25c=515

(Is that correct? I don't know.)

But for the other equation I am clueless.

 Dec 6, 2015
edited by Guest  Dec 6, 2015

Best Answer 

 #1
avatar+118724 
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Bruce has $5.15 in dimes and quarters. He has 8 more quarters than dimes. How many quarters does he have?

 

We have done 2 of these for you already.  I want you to show me how you would start the problem.

Let D be the number of dimes (10c) and Q be the number of quarters (25c)

 

He has 8 more quarters than dimes.  Turn that into a number sentence please 

 Dec 6, 2015
 #1
avatar+118724 
+5
Best Answer

Bruce has $5.15 in dimes and quarters. He has 8 more quarters than dimes. How many quarters does he have?

 

We have done 2 of these for you already.  I want you to show me how you would start the problem.

Let D be the number of dimes (10c) and Q be the number of quarters (25c)

 

He has 8 more quarters than dimes.  Turn that into a number sentence please 

Melody Dec 6, 2015
 #2
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+5

Let D=number of dimes,but we have,

D + 8=number of quarters, but,

.10D + .25(D + 8)=$5.15

.10D + .25D + 2=5.15

.35D=5.15-2=3.15 divide both sides by .35

D=3.15/.35

D=9 number of dimes that Bruce has, and

9 + 8=17 number of quarters that Bruce has. Because:

(17 X .25) + (9 X .10)=$5.15 

 Dec 6, 2015

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