The multipliers of this system of equations have been determined to create opposite terms of the x-variable.
8(-3/4x+4/5y=14) -> -6x+32/5y=112

3(2x+7/10y=-9) -> 6x+21/10y=-27

what is the value of y?
a. -10
b. -8
c. 8
d. 10

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?