Twice the sum of a number and negative nine is twenty. Which of the following represents the number?

A.) - 1 B.) 14.5 C.) 1 D.) 19

Starting time 2:15 A. M. elapsed time 45 minutes my answer is now?

A right cone has a base diameter that is 12cm and a slant height that is 45cm what is the surface area

The interior angles of a polygon add up to 1,800°. How many sides does it have? Give a reason for your answer.

Maria was playing a game with her brother. She said "I'm thinking of a number. When you multiply my number by six and add seven, you get twenty five. What is my number? Explain.

Ra IB CR Kelly simplified this power of a product (7w-9-3 1. 73. (w-93 2 343 w27 Use Kelly's steps to simplify this expression (5w?) ? What is the simplified power of the product? 5w 10w14 25w 25w14

Are all cubes congruent

Find the normal form of the equation of the plane that passes through p = (0, - 4, 5) and is parallel to the plane with general equation 3x - y + 5z = 3.

Five times a number x minus 9 is two thirds of a number y. What is the equation?

The maximum weight an airline allows for a suitcase is 50 pounds. Ella's suitcase weighs 8 pounds empty. If Ella meets the requirements, what could be the weight of the contents of her suitcase?

A flight instructor charges $50 per lesson, plus an additional fee for the use of his plane. The charge for the use of the plane varies directly with the square root of the time the plane is used.