Betty has 741 coins in her piggy bank, worth a total of 10,725 cents. The piggy bank contains ONLY quarters and dimes. How many
dimes has betty saved?
1 answer:
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Using the given data you can build the linear regression (described by linear function y=ax+b) by hand or you can use math calculator to do this. In attached diagram you can see that
and
Then the equation of linear function is
Answer: correct choice is D.
Looks like you did most of it.
The next step would be setting them equal to 105, like the problem suggests.
Then we can plug back in to find the numbers.
The three numbers are .
Hope this helps.
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