4. Solve the simultaneous equations
x2 + y2 = 20
3x = 2-y
Do with step by step please

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

How can you construct perpendicular lines and prove theorems about perpendicular lines

Tom drove 206 miles in 3.9 hours. estimate his average speed.