Asked by cassy

1. Solve: Eight coins (dimes and quarters) are worth 170 cents. How many
dimes are there? 2. Solve: Eleven coins (dimes and nickels) are worth 60 cents. How many
dimes are there? 3. Eleven coins (dimes and quarters) are worth 170 cents. How many
dimes are there?
Answered by oobleck
#1. add up the value of the coins. Note that if there are d dimes, then the rest (8-d) are quarters. That means that the value of the coins is
10d + 25(8-d) = 170
Now just solve for d.

Now do the others in like wise.
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