Which equivalent fractions can you use to find the sum of 2/8 + 3/9?

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?

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion

Ithink i know it but i want to be sure so can you me out ?