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maw [93]
3 years ago
13

A boy has 11 coins in dimes and quarters. Their value is $1.70. How many of each does he have? Which of the following equations

could be used to solve the problem? x + (11 - x) = 1.70 25x + 10(11 - x) = 1.70 0.10x + 0.25(11 - x) = 1.70
Mathematics
2 answers:
wel3 years ago
6 0
Translate the statements into equations. We can use 'x' for dimes and 'y' for quarters.

"<span>A boy has 11 coins in dimes and quarters"

\sf x+y=11

"</span><span>Their value is $1.70"

</span>\sf 0.10x+0.25y=1.70<span>

To solve this, we can first solve for one of the variables in the first equation, and then plug that into the second equation:

\sf x+y=11

Subtract 'x' to both sides:

\sf y=11-x

Now plug this value of 'y' into the second equation:

</span>\boxed{\sf 0.10x+0.25(11-x)=1.70}

So this equation could be used to solve the problem.
Leya [2.2K]3 years ago
3 0

0.10x + 0.25(11 - x) = 1.70

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