And explain if you can. i don't get this stuff : / (will give brainiest answer is correct, if possible)

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

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

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with