A car moves from A to B at a speed of 50km/hr and comes back from B to A at a speed of 30 km/hr .Finds it's average speed during the journey

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years