Answer:
n + 3n
Step-by-step explanation:
If the unknown number is represented by n, then 3 times the unknown number is 3n.
The sum of n and 3n is written as ...
... n + 3n
_____
This can be simplified to 4n, but we believe the intent of the question is to see the sum, not the total.
Answer:
Impossible, they add up to 169 degrees,
Step-by-step explanation:
The greatest the other can be is 160/-40 = -4.
The least the other can be is 200/-20 = -10.
Answer: Ratio of new volume to original volume is 2:1.
Step-by-step explanation:
Let the radius of cylinder be 'r'
Let the height of cylinder be 'h'
Original volume of cylinder will be
![V=\pi r^2h](https://tex.z-dn.net/?f=V%3D%5Cpi%20r%5E2h)
If radius get doubled,
New radius be '2r'
If height get halved,
New height be will be
![\frac{h}{2}](https://tex.z-dn.net/?f=%5Cfrac%7Bh%7D%7B2%7D)
so, Volume of cylinder becomes
![Volume=\pi (2r)^2\times \frac{h}{2}=\pi \times 4r^2\times \frac{h}{2}\\\\Volume=2\pi r^2h](https://tex.z-dn.net/?f=Volume%3D%5Cpi%20%282r%29%5E2%5Ctimes%20%5Cfrac%7Bh%7D%7B2%7D%3D%5Cpi%20%5Ctimes%204r%5E2%5Ctimes%20%5Cfrac%7Bh%7D%7B2%7D%5C%5C%5C%5CVolume%3D2%5Cpi%20r%5E2h)
Ratio of new volume to the original volume is given by
![2\pi r^2h:\pi r^2h\\\\2:1](https://tex.z-dn.net/?f=2%5Cpi%20r%5E2h%3A%5Cpi%20r%5E2h%5C%5C%5C%5C2%3A1)
Hence, Ratio of new volume to original volume is 2:1.
Answer:
26.13716694
Step-by-step explanation:
the area of a semi cirlce is 1/2(π*r^2) so it was 14.13716694 and then you find the area of the triangle witch is H*B/2 and then add them 3 numbers together whitch is 6+6+14.13716694=26.13716694