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Mrrafil [7]
3 years ago
13

A collection of 108 coins containing only quarters and nickels is worth $21 wich value could replace q on the chart?

Mathematics
2 answers:
Greeley [361]3 years ago
5 0

Answer:

There would be 30 nickels and 78 quarters.

Step-by-step explanation:

To find this, start by creating a system of equations in which x is the number of nickels and y is the number of quarters. Make the first equation the total number of coins.

x + y = 108

Make the second equation based on the value.

.05x + .25y = 21

Now multiply the second equation by -4 and add together to get the y value to cancel.

x + y = 108

-.2x - y = -84

--------------------

.8x = 24

x = 30

Now use this value to find y.

x + y = 108

30 + y = 108

y = 78

Makovka662 [10]3 years ago
5 0

Answer:

There would be 30 nickels and 78 quarters.

Step-by-step explanation:

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What is the slope of the following 12x - y = 30<br> -12
antiseptic1488 [7]

Answer:

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Step-by-step explanation:

Rearrange into the form y = mx + c, where m is the slope.

12x - y = 30

y = 12x - 30

m = 12

4 0
3 years ago
$6000 is invested in an account that earns 4.5% annual interest, compounded continuously. What is the value of the account after
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3 years ago
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valina [46]

Answer:

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Step-by-step explanation:

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_____

<em>Comment on the answer</em>

The conversion factor given is good for 2 significant digits, so the answer would be appropriately rounded to 23,000 qt. The real conversion is to 23,496.519025 quarts when rounded to 6 decimal places.

3 0
3 years ago
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2 years ago
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Feel free to contact me with further questions.
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