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pierceybbpow8o39
21.01.2020 •
Mathematics
Calculate the average (arithmetic mean) for the data set (rounded to the nearest tenth
[18, 23, 17, 25, 15, 18, 18, 16, 27, 25, 18, 19)
a)
19.6
19.9
201
20.3
20.6
Solved
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Ответ:
the second one for #4 and the third one for #5
Step-by-step explanation:
4. The sum of x and y is 24, so x+y = 24. The difference is 15, so x-y = 15, or
y-x=15 (they didn't specify which was which). Therefore, A, C, and D are correct, so x = 15-y is the answer (x = 15-y is the same as x+y = 15, which is false).
5.
Matt = 6 apple pies + 4 lemon pies and he got 80 dollars.
Ming = 6 apple pies + 5 lemon pies and he got 94 dollars.
If apple pie is "a" and lemon is "l":
6a + 4l = 80
6a + 5l = 94,
so C is the answer