Which of the following expressions is equal to - x^2-4? A. (-x-2i)(x+2i)
B. (-x-2i)(x - 2i)
C. (x + 2i)(x - 2i)
D. (-x +2i)(x-2i)

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

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%

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?