Use complete sentences to describe why it is necessary to do the same thing to both sides of an equation to perform valid operations.

Giving 100 points asap bev has to cut her grandma's grass this weekend and wants to know exactly how much area she will be cutting. calculate the area of the polygon. be sure to show all your work and explain your answer.

Ivan and jeff buy a package of 8 pens for $4.00. ivan wants 5 of the pens, and jeff wants 3.how much should each student pay?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²