2L plus 2L plus 1.5L plus 2.5L=8L just making shore it is right?

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

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!