On Tuesday Shayna bought 7 boxes. On Wednesday half of all the boxes were destroyed. On Thursday there were only 21 left. How many did she have on Monday?

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

Simplify the expression below. -5 (2x - 1) + 3x

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?