In this picture, m∠PQR = 161° and m∠SQR = 38°. If m∠PQS = (2x + 15)°, what is the value of x? A.
54
B.
108
C.
123
D.
92

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%

Aline segment is different from a line in that a segment has

(! ) the figure below shows parallelograms abce, pqrs, and tnlm on a coordinate plane. points s, p, q, and r are midpoints of abce t, n, l, and m are midpoints of pqrs write the equation of line ml. show your work.