The cost of 7 apples is $2.10. What is the constant of proportionality that relates to the number of apples ,x, to the cost in dollars and cents, y?

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