I used 9 sheets of toilet paper each day for 7 days. The roll had 96 sheets when it was new. How many sheets of toilet paper have not been used?

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?

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?