It cost $0.25 to use a dryer at a laundromat for 15 minutes. The expression 0.25m ÷ 15

represents the cost, in dollars, of using a dryer for m minutes. What is the cost to use the dryer for 120 minutes?

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

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?