Adepartment store's customer parking lot has 4 rows with an equal number of parking spots in each row. the lot also has 15 parking spots for store employees. if c cars can be parked in each of the 4 main rows of the parking lot, what is the expression for the maximum number of cars that can be parked in the parking lot? 15c − 4 c(15 − 4)

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?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

Oliver had $50 on the day before his birthday. after he recived some money for his birthday , he had $75. write and solve eqaution to find how much money oliver received for his birthday. x+50=75