Simplify the given expression.
(–3x2 – 9x + 17) – (15x2 + 20x – 4)
question 1 options: –18x2 – 29x + 13 –18x2 – 29x + 21 –18x2 – 11x + 21 –18x2 – 24x + 13

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

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 inequality has a dashed boundary line when graphed ?