Using multiplication property of equality solve x/2=6

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5

If wxyz is a square, which statements must be true?

Which account has the highest effective annual interest rate? not necessary but show how you got your answer. a. account 1: interest is compounded quarterly at an annual rate of 4.20%.b. account 2: interest is compounded monthly at an annual rate of 4.15%.c. account 3: interest is compounded semiannually at an annual rate of 4.10%d. account 4: interest is compounded annually at a rate of 4.25%.