What are the like terms in the algebraic expression? -ab+6ab-8+5ab-6a-b
O -band - 6a
O -²band 5ab
O 6aband 5ab
O Baband - 6a

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?