Which equations show that the set of whole numbers is closed under addition?

Choose all answers that are correct.

A.

0 + (-1) = - 1

B.

1 + 1 = 2

C.

2 + 0 = 2

D.

2 + (-1) = 1

Find the area of a triangle whose base is 5cm and whose height is 12cm.

1.5 yards of ribbon If each ribbon costs 10 cents per foot, what is total cost of ribbon in dollars

10=ax-3b solving for x

What is 5 multiplied by 1/6 as a mixed number

Multiply the following polynomials, then place the answer in the proper location on the grid. Write the answer in descending powers of a. (4x^2 - 10x - 24) (2x + 3)

Kailey wants to buy 4 pencils and 3 notebooks. witch expression shows how to find the total cost of 4 pencils and 3 notebooks. a. 3 ($0.50) + 4 ($2.25) b. 4 ($0.50) - 3 ($2.25) c. 4 ($0.50) + 3 ($2.25) d. 4 ($0.50) X 3 ($2.25)

If 48 men have ration for 16 days how long will the food last if a reinforcement of 16 men arrived

Explain how you know wether to choose grams or kilograms when measuring mass. Name an object you would measure each unit.

16:07:48 marks: Question: 1/20 The graph of which equation would be a circle with a center at (2.3) and a radius of 7? A. (x + 2y = (y - 3) = 7 B. (x - 2) = (y + 3) = 7 C. (x - 2y + (y + 3) 2 = 49 D.

Samuel wants to estimate what 5843 x. 00243 is. What should his first step be?