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topjm [15]
2 years ago
14

Deijah gave Isaiah $6.25 in nickels and quarters. If 12 coins were quarters, how many coins were nickels? Which equation models

this problem?
A) 0.25•12+0.05•n=6.25

B) 0.05n+625=0.25•12

C)25+5n=6.25

D) 6.25+0.05=12•0.25
Mathematics
1 answer:
dem82 [27]2 years ago
4 0
Deijah has $6.25. 

Now, this 6.25 is comprised of 0.05s and 0.25s. 
We know that there are 12 0.25s.

We now want to know how many remaining 0.05s there are.

Again, we know that the number of 0.05s he has, which is 12, multiplied by 0.05, plus the number of 0.25s he has, multiplied by 0.25, equals 6.25.

Thus, the answer is A, 0.25 x 12 + 0.05 x n = 6.25.
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The perimeter of a rectangular field is 380 yd. The length is 70 yd longer than the width. Find the dimensions.​
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Answer:

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Step-by-step explanation:

             w

           ____

           |         |

w+70   |         |   w+70

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           ---------

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add all the sides

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move the 140 to the other side of the =

4w=380-140

4w=240

divide both sides by 4

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to get the length plug in 60 to w+70   to get 130 and width is just 60.

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