Mark loads a crate that weighs 22.5 pounds and 12 boxes that each weigh 11.25 pounds onto a truck. what is the total weight of the crate and the boxes.

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 equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

What is the result of adding the system of equations? 2x+y=4 3x-y=6