Using the numbers -4, 10, 8, 2, -3, and -5 create two expressions that equal 6

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?

Which is f(5) for the function –2x2 + 2x - 3?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?