If greg has 6 quarters and 15 pennies.how many total coins do greg and his brother have

Simple math problem here! :)

You add.

6 + 15 = 21 coins.

But, if you meant how much money do they have total the answer would be as followed. 

1 quarter = 25 cents
So 6 * .25 = 1.50 
(1 dollar and 50 cents)

1 penny = 1 cent
So 1*15 = 15.

Now you add!

1.50 + 15 = 1.65
(1 dollar and 65 cents.)

Hope this helps. c:

Airline tickets

Step-by-step explanation:

The other three could be considered important. Your dream vacation may seem important to you, but is something you should only do if you can pay for it. Never go in debt for it.