Monthly owner costs without a mortgage are 755$ what would the monthly cost without mortgage be for four months? (I’ll mark u brainliest just pls help)

Just tell me how to set up the equation.

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

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?