Which is true about modeling a solution to an addition problem on a vertical number line? a. when adding a negative number, you move down. b. when adding a positive number, you move down. c. locating the sum is not necessary. d. locating the sum is the first step.

The verbal translation for the difference of m and 7 increased by 15

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?

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab