Step-by-step explanation:
(9x-8)-(x+4)=8x+12
9x-8-x-4=8x+12
8x-12=8x+12 (no it's not)
So it's false.
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Question: brainly.com/question/19989741
650 kgs is equal to 1,433 lbs. I believe the mistake would be that they forgot to add a period in between 65 and the 0, because 65.0 kgs is equal to 143.3 lbs.
20% is equal to 0.2
0.2 times 26.40 is equal to 5.28
26.40 minus 5.28 is equal to 21.12
Answer:
B. He used the wrong expression to represent the area of the base of the pyramid.
Step-by-step explanation:
Given
See attachment for pyramid
![Area = (33.2)(34.2) + 4 * \frac{1}{2} * 34.4 * 28.4](https://tex.z-dn.net/?f=Area%20%3D%20%2833.2%29%2834.2%29%20%2B%204%20%2A%20%5Cfrac%7B1%7D%7B2%7D%20%2A%2034.4%20%2A%2028.4)
Required
Vikram's error
The surface area of a square pyramid is:
![Area = Base\ Area + 4 * Area \triangle](https://tex.z-dn.net/?f=Area%20%3D%20Base%5C%20Area%20%2B%204%20%2A%20Area%20%5Ctriangle)
Where
![Base\ Area = Length * Length](https://tex.z-dn.net/?f=Base%5C%20Area%20%3D%20Length%20%2A%20Length)
![Base\ Area = 34.2 * 34.2](https://tex.z-dn.net/?f=Base%5C%20Area%20%3D%2034.2%20%2A%2034.2)
![4 * Area \triangle = 4 * \frac{1}{2} * Base * Height](https://tex.z-dn.net/?f=4%20%2A%20Area%20%5Ctriangle%20%3D%204%20%2A%20%5Cfrac%7B1%7D%7B2%7D%20%2A%20Base%20%2A%20Height)
![4 * Area \triangle = 4 * \frac{1}{2} * 34.2 * 28.4](https://tex.z-dn.net/?f=4%20%2A%20Area%20%5Ctriangle%20%3D%204%20%2A%20%5Cfrac%7B1%7D%7B2%7D%20%2A%2034.2%20%2A%2028.4)
So:
![Area = Base\ Area + 4 * Area \triangle](https://tex.z-dn.net/?f=Area%20%3D%20Base%5C%20Area%20%2B%204%20%2A%20Area%20%5Ctriangle)
![Area = 34.2 * 34.2 + 4 * \frac{1}{2} * 34.2 * 28.4](https://tex.z-dn.net/?f=Area%20%3D%2034.2%20%2A%2034.2%20%2B%204%20%2A%20%5Cfrac%7B1%7D%7B2%7D%20%2A%2034.2%20%2A%2028.4)
By comparing the calculated expression with
![Area = (33.2)(34.2) + 4 * \frac{1}{2} * 34.4 * 28.4](https://tex.z-dn.net/?f=Area%20%3D%20%2833.2%29%2834.2%29%20%2B%204%20%2A%20%5Cfrac%7B1%7D%7B2%7D%20%2A%2034.4%20%2A%2028.4)
Option (b) is correct