Is the set of real numbers closed under addition?

During a construction project, engineers used explosives to excavate 140 feet of tunnel into a mountain. but because of time constraints and environmental concerns, they brought in a tunnel boring machine (tbm) to excavate the rest of the tunnel.

Anna sees a thermometer each morning when she walks out of her house to get on the school bus. In the following table, she recorded the outdoor temperature each morning for five days.

Which question can best be answered by finding the surface area of a figure? A. How much water is needed to fill a pool? B. How much paint is needed to paint a cube? C. How far will a car drive around an oval race track? D.

Which algebraic expression is a polynomial with a degree of 2? O 4x3 - 2x O 10x2 - 8x3 + 5 + 3 X O 6x2 - 6x + 5

Five family members will bowl this month. The prices at Dans alley are $5 per game and $3 for shoe rental. The total budget is $115. The budget for gas and food is $25. Write an equation to find how many games each family member can bowl.

The maximum depth dmax that a diver can snorkel is set by the density of the water and the fact that human lungs can function against a maximum pressure difference (between inside and outside the chest cavity) of 0.056 atm.

How many square feet of cardboard does Jessica need to make a rectangular prism with length of 16 inches, width of 9 inches, and height of 4 inches?

Simplify each expression. Then state the coefficient of the variable in each expression. 1. U + u + u + u

What is the standard form of the equation - 3y=8-4x

How is the distrubutive property used to expand expressions 3 (x+4) make sure you say how you get the answer