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eduard
2 years ago
10

5. I have 25 coins consisting of 5-cent and 50-cent pieces. If the total value is $7.10, how many 5-cent coins do I

Mathematics
1 answer:
VARVARA [1.3K]2 years ago
6 0

Answer:

x = # of 5 cent coins

y = # of 50 cent coins

x+y=25

.05x+.5y=7.1

y=25-x

(.05x+.5(25-x)=7.1)100

5x+50(25-x)=710

5x+1250-50x=710

-45x=-540

x=12

You have 12, 5 cent coins and 13, 50 cent coins.

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The bottom of a rectangular swimming pool has an area of 150 square meters and a perimeter of 50 meters. What are the dimensions
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The  dimensions of the pool is 15m by10m

<h3>Area and perimeter of rectangle</h3>

A pool is rectangular in nature. If a rectangular swimming pool has an area of 150 square meters and a perimeter of 50 meters, then;

lw = 150

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From the equation 3

l = 25 - w

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Hence the  dimensions of the pool is 15m by10m

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