A guidance counselor is planning to schedules for 30 students. Every student will take either French or English or Latin. 16 want to take French,16 want English and 11 want Latin. 5 want both French and Latin, and of these, 3 want English as well. 5 want only Latin and 8 want only English. How many students want French only?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Nine more than four times a number is the same as one less than twice the number. find the number?

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project