Which one is correct ; BODMAS , BOMDAS, BIDMAS or PIDMAS?

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

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

Given the functions, f(x) = 2x^2 - 1 and g(x) = 5x, find f(g(x)) and g(f(