Which is an example of the commutative property?

A.

- (11 + 4) = - 11 + (-4)

B.

-13 + 13 = 0

C.

9 + (-4 + 7) = (9 + - 4) + 7

D.

18 + (-14) = - 14 + 18

Which way shows how to make a ten to find 12-4?

Michael and Levin ran laps after school to train for the football team. The ratio of the number of laps Michael ran to the number of laps Levin ran was three to four. If Michael ran 12 laps, how many laps did Levin run?

Sales tax and purchase price: suppose the sales tax rate in a certain state is is 8% how much sales tax is charged on a new car if the purchase price is $11,900?

If a figure is a square, than it has at least two right angles.

Which expression have a value - 7

What is 240,000,591 divides by 176

Solve 3x2 18x 15 = 0 by completing the square. a. 3 (x 3) 2 = 6; x = - 3 square root 2, x = - 3 - square root 2 b. 3 (x 9) 2 = 12; x = - 11, x = - 7 c. 3 (x 3) 2 = 12; x = - 5, x = - 1 d.

A pillow that usually cost $18 is marked down 25% what is the markdown and what's the new price

Square root of one hundred and twenty three

Suppose commute times in a large city are normally distributed and that 62.50% of commuters in this city take more than 21 minutes to commute one-way. if the standard deviation of such commutes is 6.2 minutes, what is the mean commute?