A basic cellular package costs $30 per month for 60 minutes of calling, with an additional charge of $0.50/min beyond that time. The cost formula would be C = 30 + 0.50(x − 60),
where C is the cost measured in dollars and x is the number of calling minutes used. If you cannot have a bill greater than $90, what is the maximum number of calling minutes you can use?

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?

(50 points) drag each description to the correct location on the table. each description can be used more than once. some systems of equations and their graphs are given in the table. for each system, place the description(s) in the box that correctly describe the type of system shown. :

Deena is planting two rectangular gardens. one garden is 3.67 feet by 8.56 feet, and the other garden is 3.67 feet by 7.45 feet. which expression does not respresent the total area in square feet of the two gardens