Elena wants to prove that a quadrilateral with 4 right angles must have congruent opposite sides. 1.)Explain to Elena how she can use the fact that all rectangles are parallelograms in her proof.

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Arectangular prism is 3 meters long, 6 meters wide, and has a height of 9 meters. what is its surface area?

Formulate alisha has a number in mind. if she adds three to her number the result is less than five. use this information to write and solve an inequality about alisha's number. then graph the solution set.

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?