Suppose that from a group of 30 athletes, 17 compete in a 100-meter race, 8 compete in a 200-meter race, and 4 compete in both races. How many athletes don't compete in either of the
two races?

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

27 is what percent of 108? 27 is % of 108

The estimated number of people to attend the last bengals game of the season was 2000. the actual number of fans attending was 1200. by what percent did the estimate differ from the actual?