3x-5y=6 y=2x +3what is the answer out of these options no solution one solution or infinitely many solutions

Can (3,5 and square root 34) be sides on a right triangle?

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?

What is always true when two whole numbers are subtracted?