Which property is this?

9a + (-9a) = 0

Serena's average speed during her training run was 8 kilometers per hour over the 2 hours that she ran.

The length of a football field is 100 yard and the width is 53 yard. In the fist game of the season, Jos catches the opening kickoff at the corner of the goal line and runs straight as a string the diagonal length of the field to score s touchdown.

X^2 - 9X = 0. Factor and use the Zero property to solve

How do you simplify 267/45

A bank sends its customers an e-mail when their accounts fall below - $10. Which inequality models this situation? A) a-10 C) a≥-10 D) a≤-10

What are the solutions to x^2 + 8x + 7 = 0

Kevin says that lines p and m will eventually intersect. Is Kevin correct?

Lily plants 7 new rose bushes each year. If she has 35 rose bushes already, how many total rose bushes will she have in 4 years? A. 28 rose bushes B. 63 rose bushes C. 42 rose bushes D. 49 rose bushes

The length of a rectangle is two times the width of the rectangle. The perimeter of the rectangle is 24 cm. Draw the rectangle on a centimetre grid.

What is the shape of - 2x^ (2) + 6y^ (2) + 5x+5y-4=0