Answer:
the answer is x ^ 272
Step-by-step explanation:
subtract
In order to get the results shown,
the calculations must be done incorrectly. Ordinarily, instructions to round to a particular precision should be applied only to the final result(s). Here, you are expected to round every intermediate result. (This is generally considered to be WRONG!)
![\sum{X}=1735\\n=4\\\overline{X}=mean=\frac{1735}{4}=433.8](https://tex.z-dn.net/?f=%5Csum%7BX%7D%3D1735%5C%5Cn%3D4%5C%5C%5Coverline%7BX%7D%3Dmean%3D%5Cfrac%7B1735%7D%7B4%7D%3D433.8)
The numbers in the column
![(X-\overline{X})^{2}](https://tex.z-dn.net/?f=%28X-%5Coverline%7BX%7D%29%5E%7B2%7D)
are simply the squares of the numbers in the column to its left. Round the squares to tenths. Their sum should be the value indicated in the bottom row.
The standard deviation is the square root of the variance,
√(99667.2) ≈
315.7
You simplify
4i(2-i)(5+31)
And you get
144+288i
Answer:
5. x=21.9 units
6. x=14 units
7. x=31.7 units
Step-by-step explanation:
5. Assuming that the line through the middle of the triangle in 5, we can split the 18 units side into 9 and 9. Using pythagorean theorem (a^2+b^2+c^2), we can find that x is equal to
making x
. Rounding to the nearest tenth, we get x is about 21.9 units
6. By doing pyth. th. on one of the triangles, we get sqrt(361-289) which is sqrt(72), which is about 8.5 units. Subtracting 8.5*2 from 31, we get 14 for x
7. by doing pyth th on the smaller triangle, we get sqrt 228 and now we can do pyth th again with 28 (44-16) and sqrt228, which turns out to be sqrt (784+228) which is sqrt (1002), which when rounded the nearest tenth is 31.7
Good Luck!