Idon’t understand what ? is. it’s pythagorean theorem and i know for this question, you have to add, but i always get an answer that makes no sense!

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?