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Shtirlitz [24]
3 years ago
12

A money box contains only 10-cent and 20-cent coins. There are 34 coins with a total value of $5.40. How many coins of each

Mathematics
1 answer:
kow [346]3 years ago
4 0
10x+20y=540
x+y=34
y=34-x

Plug in (34-x) for y:
10x+20(34-x)=540
10x+680-20x=540
-10x=-140
10x=140
x=14

There were 14 ten cent coins and 20 20 cent coins
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The formula C=5/9 (F-32) can be used to convert a temperature from degress Fahrenheit to degress Celsius.
Lina20 [59]
B) 0.56
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The area of a circular fountain is 121pi square feet. What is the diameter of the fountain?
Alla [95]

Answer:

22 feet

Step-by-step explanation:

Area of circle = pi(r²)

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7 0
2 years ago
The sum of two numbers is forty-five. two times the larger number is three times the smaller number.
Kitty [74]
X+y=45
2x=3y

2(45-y)=3y
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8 0
3 years ago
At a clearance sale,Jill got 70% off a silver bracelet.If she paid the cashier $27 ,what was the original price of the bracelet​
mart [117]

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$38.57

Step-by-step explanation:

Make a proportion.

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Round the result to the hundredths place.

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**Hope this helps!

4 0
3 years ago
Show me how to do 0.2268÷0.84
vazorg [7]

Answer:

0.27

Step-by-step explanation:

1. put it into the division form which is 0.2268/ 0.84.

2. then see if 0.84 can go into 0.22 if not then 0.226

3. if yes see how many times it can go into 0.226 which is 2.

4. continute these steps until there is no remainder

6 0
3 years ago
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