Mathematics, 10.06.2020 18:57 bbyany21

What’s the degree of the rotation?

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Mathematics, 21.06.2019 13:00, klysse123

Aregression was run to determine if there is a relationship between hours of tv watched per day (x) and number of situps a person can do (y). the results of the regression were: y=ax+b a=-0.662 b=30.418 r2=0.703921 r=-0.839

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Mathematics, 21.06.2019 16:40, Alex9089435028

The sum of two numbers is 86, and their difference is 20. find the two numbers

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Mathematics, 21.06.2019 17:00, christiancase06

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

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Mathematics, 21.06.2019 19:00, ale1910

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?