D=6 and e=2: 4e + d +12 -2e

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?

With alll of except for the 2 that i did already

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?