Which of the following transformations does NOT maintain congruence?
A
Rotation

B
Reflection

C
Translation

D
Dilation

What properties allow transformation to be used as a problem solving tool

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?

Solve the formula ax+ by = c for x.