Xsquared divided 2=w-y make x the subject

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

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

Harry owes the bank money. to repay his debt, he paid $150 back to the bank each month. after 10 months, his remaining debt was $6900. what was the original amount of harry's debt? how long did it take harry to pay back his entire debt?