10w + 17 – 5w
5w - 20 + 2w

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?

Witch represents the inverse of the function f(x)=1/4x-12

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12