Type the correct answer in the box.
log +logi – logis = log

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?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15