ABCDE is a convex pentagon. Given AB = 5, BC = 12, AE= 13, DE = 8, CD = 6, and m∠B=m∠D=90°. Find the area of ABCDE.

What expression is equivalent to (2x-1)(x-3)?

Given abcd ac=38 and ae=3x+4 find the value of x

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%