One elvis stamp and one liberty stamp cost a total of .63. a sheet of 40 elvis stamps and 20 liberty stamps cost a total of 18.40. determine the price of an elvis stamp and a liberty stamp.

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

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What is the interquartile range of this day at set?