What is 40% of 20
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What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2