Which shows the expression x^2-1/c^2-x in simplest form?

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set

Question 5 of 10 2 points if a population is a sample of the population could be a. registered voters; all citizens o o b. baptists; all religious people o c. people who purchased shoes; all customers o d. the entire school faculty; math teachers

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?