Triangle XYZ is reflected across the x-axis to produce triangle X'Y'Z'. Then triangle X'Y'Z' is rotated 90° counterclockwise about the origin to create triangle X"Y"Z". If triangle X"Y"Z" has vertices X"(4, 0), Y"(2, −1), Z"(2, 1) what are the coordinates of the vertices of triangle XYZ?

Use pemdas 12.3-2.2x 8.4 divided by 2

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%