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anonymous
 4 years ago
A jar contains $31.50 in nickels and quarters. There are 178 coins in the jar. How many quarters are in the jar?
anonymous
 4 years ago
A jar contains $31.50 in nickels and quarters. There are 178 coins in the jar. How many quarters are in the jar?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[.25x+.05(178x)=31.50\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0put x = number of quarters, which have a total value of .25x, and since there are 178 coins total if there are x quarters there are 178  x nickels which have a total value of .05(178x)

Hero
 4 years ago
Best ResponseYou've already chosen the best response.0I always end up forgetting a variable or something.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0add them up and get there combined value \[.25x+.05(178x)=31.50\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0it looked good to me!

Hero
 4 years ago
Best ResponseYou've already chosen the best response.0Satellite, how do you avoid making typing mistakes?

Hero
 4 years ago
Best ResponseYou've already chosen the best response.0What I meant to write was: n + q = 178 .05n + .25q = 31.50 The first time I forgot the q in the second equation. That's why I deleted it.

mathmate
 4 years ago
Best ResponseYou've already chosen the best response.0178 coins in quarters (0.25$) and nickels (0.05$) are worth $31.50. If you don't have a calculator, nor pen and paper, this is how you would do it: 178 quarters are worth $44.50, that's $13 too much. In changing a quarter for a nickel, we reduce by 0.250.05=$0.20. So we would change $13/0.02=65 quarters for nickels. So we have 65 nickels and 17865=113 quarters.
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