Order the set of numbers from least to greatest: root 64, 8 whole 1 over 7, 8.14, 15 over 2?

Beth took out a $20,000 loan for college she is borrowing money from two banks. bank a charges an interest rate of 8.5% bank b charges and interest rate of 10.5% after one year alice owes $1860 in interest how much money did she borrow from bank a

Ineed i been stuck on this question since yesterday

X+y=-4 x-y=2 use elimination with adding and subtraction