10 points! use elimination to solve the equation. 2r+3t=9 3r+2t=12

Chose the graph below that represents the following system of inequality’s

What is the first step of an indirect proof of a number that is divisible by two

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?