Solve for x: 5x + 2 =4x -9

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

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?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length