Which represents the solution (s) of the system of equations, y = x2 - 4x - 21 and y = - 5x - 22? Determine the solution set algebraically.

(-1, - 17)

(1, - 27)

(-1, - 17) and (1, - 27)

no solutions

Gary walked 1 1/2 km to school, then 750 m to his job, then 1 km home. How many kilometres did he walk altogether?

If the time is 4:25 am what is the time that is 9 hours and 40 minutes before the time is shown

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 2.2 days. What is the 90th percentile for recovery times? (Round your answer to two decimal places.)

G (n) = 2n f (n) = n²-n Find g (f) 7)

Two pairs of statements about Jeff's housing expenditures are given below. How can both pairs of statements be true? When did Jeff spend more on housing? Be prepared to discuss your answers in class.

4.9 divided by 160.72

What is |3+10|=|3|+|10|

A number between 1 and 20 that has exactly 5 factors

The product is 80. One factor is 4. What is the unknown number

A math conference has an attendance of 4950 people. Of these, 2110 are college professors and 2575 are female. Of the college professors, 960 are female. Find the probability that a randomly selected attendee is female or a college professor.