What is the solution to the system of equations? 2x – y = 7 y = 2x + 3

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?

Alakefront cottage that is 30 feet high casts a shadow on the water. how long is that shadow if a 16-foot-high truck parked nearby casts an 8-foot shadow?

The radius of the sphere is 10 units .what is the approximate volume of the sphere use π=3.14