How many times do you have to roll an ordinary di(c)e in order to be certain that at least one number is rolled twice? Note: "Ordinary" refers to having 6-faces/sides on the cube.
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Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?