11. what is the perimeter of a rhombus-shaped street sign with a 35-cm side? a. 280 cm b. 1,225 cm c. 70 cm d. 140 cm

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

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?

Is a positive integer raised to a negative power always positive