2n+3n+7=-41. how do you solve number 1?

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

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?

What is the slope of (0,32) and (100,212)