What is 20 times 4 free points lol

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

Caitlin had 402. in her bank account.she withdrew $15.each week to pay for swimming lesson. she now has $237.

The scale factor of the dimensions of two similar wood floors is 5 : 4. it costs $384 to refinish the smaller wood floor. at that rate, how much would it cost to refinish the larger wood floor?