You borrow $21 from your grandmother to go to the movies. You earn $7 for washing the dishes for a week. You give your grandmother the $7 you earned to pay her back. How much do you owe your grandmother?

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?