Help me please and thank you

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5