Which best describes the solutions to the system? x + y=− 4
−2x − 2y =0

A one solution
B (0,0)
C no solution
D infinitely many

Which of the following will form the composite function?

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)