What additional information is needed to prove the triangles are congruent by the sas postulate?

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

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?

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?