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arielcainess
24.02.2021 •
Mathematics
Find the area of the figure.
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Ответ:
100
Step-by-step explanation:
cut the figure into 2 sides and multiply 8x5 then once you have cut it in half its not 10x12 it is 5x12 you get 40 and 60 then add together to get 100
Ответ:
80+10
90 cm square
Hope it helps you
Mark me as brainliest
Ответ:
12.20.
Step-by-step explanation:
Variance = ∑( x - m)^2 / n where m = mean and n = number of readings.
m = 84/12 = 7.
x - m for the first value is 10.4 - 7 = 3.4.
Create a table:
x - m (x - m)^2
3.4 11.56
3.3 10.89
4.7 22.09
4.1 16.81
1 1
-2.6 6.76
-4.4 19.36
-5.2 27.04
-4.5 20.25
-2.6 6.76
0.3 0.09
2.5 6.25
Total:
∑(x -m) ^2 = 148.86
So the variance = 148.86 / 12
= 12.20 (answer).