The Realidades workbook is a workbook students use in Spanish class. The answers should be found by looking in the text book or asking the teacher if the student needs help.
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Possible answers (40 + 3)*82 = 40*82 + 3*82 or 43*(80 + 2) = 43*80 + 43*2 or, if you really need it, (40 + 3)*(80 + 2) = 40*80 + 40*2 + 3*80 + 3*2
There are many combinations. The easiest is 82, 82, 82, 82, 82. The 2nd easiest is 80, 81, 82, 83, 84. You can create any list using: (82 - 2d), (82 - d), 82, (82 + d), (82 + 2d). Just use any number for d.
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A quarter of 82 = 82/4 = 20.5
There is an infinite number of possible answers. If you have 83, 83, 83, etc. the mean is 83. If you have 82, 83, and 84, the mean is 83.