Question

Damien has 30 coins, all nickels and dimes. The total value of all these coins is $2.05. How many nickels does he have?

Answer 1

Hi there!

nickels:19

We know that there is only nickels and dimes in his coin collection..

1.Multiply two terms:

`10`·
`10=1.00`

Then there would be 20 nickels but 1+1=2 not 2.05.

2.Multiply the terms:

`11`·
`10=1.10`

`19`·
`5=0.95`

3.Combine the two terms:

`1.10+0.95=2.05`

Therefore, there would be 19 nickels...