18.3+x+(-20.5) +(-8) when x = 30.7.
Plzz helppp

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

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?

Sioux co. replaced the roof on its existing building, therefore increasing the building's life by 10 years. the cost of the roof is considered a(n):