Dave went to the store with $40. He bought two pairs of jeans that were the same price and a shirt on sale for three dollars. If there was no tax added and the change Dave received was $13, how much did each pair of jeans cost?

3. solve the given inequality and graph the solution on a number line.

Answer this question, only if you know the answer. 30 points and brainliest!

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?