The value of y varies directly as x, with a constant of variation of 12. What is the value of y when x is -2?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

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?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?