Joe can do 10 multiplication problems in 5 seconds. At this rate, how long should it take Joe to do 2 multiplication problems?

The triangles are similar. what is the value of x? x=

Which linear inequality is represented by the graph? !

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%