Triangle RED contains the vertices R(0,4), E(3,0), D(-1,-2) what are the new coordinates if you dilate RED by a factor of 3

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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?