Question

Sally has seven times as many dimes as nickels. Their value is $3.00. How many nickels does she have?

Answer 1

Answer:

Step-by-step explanation:

Number of nickels: n

Number of dimes: d

We know that d+=+7n because Sally has seven times as many dimes as nickels.

Each of Sally's nickels is worth 5 cents, so the value, in cents, of all of Sally's nickels is 5n. Likewise, the value, in cents, of all of Sally's dimes is 10d.

We know that the total value of Sally's coins is $3.00, but we can also say that the total value of her coins is 300 cents. Now we can write:

5n+%2B+10d+=+300

But since we also know that d+=+7n, we can substitute 7n for d:

5n+%2B+10%287n%29+=+300

Solving:

5n+%2B+70n+=+300

75n+=+300

n+=+300%2F75+=+4

Therefore Sally has 4 nickels.

Answer 2

Answer:

4 nickles

Step-by-step explanation: