What is 18-3{y}=25 solve

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

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%

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse