Find the slope of the line that passes through these two points:
(-12, -1) and (-3,-4)

The product of two negative rational numbers is always zero sometimes zero never zero

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?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.