The fabric store has three fabric sheets with total 108 meters in length. After selling 1/2 of the first sheet, 2/3 of the second and 3/4 of the third, the lengths of three sheets are squal. Calculate the length of its sides
K
Khách
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26 tháng 8 2023
The first number is: (27+3) : 2= 15
The third number is: 27- 15=12
The second number is:15x4=60
Average of three numbers is: (15+12+60):3=29
Answer:29
DT
Đỗ Thanh Hải
CTVVIP
20 tháng 11 2021
1 The park has many trees and flowers
2 Are there three bedrooms upstairs ?
3 How many people are there in HN
4 Nobody in the class is as old as him
5 How much is this camera
6 It is a very beautiful house
NV
Nguyễn Việt Lâm
Giáo viên
23 tháng 7 2020
\(2^2+4^2+...+100^2-\left(1^2+3^2+...+99^2\right)\)
\(=\left(2^2-1^2\right)+\left(4^2-3^2\right)+...\left(100^2-99^2\right)\)
\(=\left(2-1\right)\left(2+1\right)+\left(4-3\right)\left(4+3\right)+...+\left(100-99\right)\left(100+99\right)\)
\(=1+2+3+...+100\)
\(=\frac{100.\left(100+1\right)}{2}=5050\left(cm^2\right)\)
