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mariarad [96]
3 years ago
14

Solve for n: 21k – 3n + 9p > 3p + 12.

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
6 0
21k - 3n + 9p > 3p + 12....for n
-3n > 3p + 12 - 9p - 21k
n < (3p + 12 - 9p - 21k) / -3
n < -p - 4 + 3p + 7k
n < 2p - 4 + 7k <===
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Step-by-step explanation:

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Using a system of equations, it is found that there are 5 dimes and 9 quarters in his pocket.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, the variables are given as follows:

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He has a total of 14 coins, hence:

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They are worth $2.75, hence, considering the value of each coin(dimes $0.1 and quarters $0.25), we have that:

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Since y = 14 - x:

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x = (0.25*14 - 2.75)/0.15.

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y = 14 - x = 14 - 5 = 9.

There are 5 dimes and 9 quarters in his pocket.

More can be learned about a system of equations at brainly.com/question/24342899

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4 0
1 year ago
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