Which shows one way to determine the factors of X-92 + 5x - 45 by grouping? x2(x-9)-5(x-9)
x2(x+9)-5(x+9)
x(x2+5)-9(x2+5)
x(x2-5)-9(x2-5)

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

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%

What is the area of the shaded sector?