A: 2x + 8y = 5 b: x + 9y = 10 to solve this system of equations by elimination, what could you multiply equation b by if you want to add the equations together and have a resulting equation with only the y-variable (the x-variable is eliminated)?

True or false look at the picture pls : /

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%

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.