Answer: 63 and 27.
Step-by-step explanation:
1 m² of carpet will cost:
![\displaystyle\\\frac{36}{20} =1,8.\\\\Hence,\\](https://tex.z-dn.net/?f=%5Cdisplaystyle%5C%5C%5Cfrac%7B36%7D%7B20%7D%20%3D1%2C8.%5C%5C%5C%5CHence%2C%5C%5C)
35 m² of carpet will cost:
![1,8*35=63.\\](https://tex.z-dn.net/?f=1%2C8%2A35%3D63.%5C%5C)
15 m² of carpet will cost:
![1,8*15=27.](https://tex.z-dn.net/?f=1%2C8%2A15%3D27.)
Answer:
Nice are they having fun ?
Step-by-step explanation:
When you plot the given points on a coordinate plane, you can see this is an ellipse that is vertical. The equation for this is
![\frac{(x-h) ^{2} }{ b^{2} }+ \frac{(y-k) ^{2} }{ a^{2} }=1](https://tex.z-dn.net/?f=%20%5Cfrac%7B%28x-h%29%20%5E%7B2%7D%20%7D%7B%20b%5E%7B2%7D%20%7D%2B%20%5Cfrac%7B%28y-k%29%20%5E%7B2%7D%20%7D%7B%20a%5E%7B2%7D%20%7D%3D1%20%20)
. Of the values a and b, a is always greater than b, so it is on our major axis, the y-axis (it's under the y-k). a is the distance from the center to the vertices. When you plotted those given points, you can see that point dead center between the foci and the vertices is the origin (0, 0). That gives us our h and k values of 0 and 0. a is the number of units from the h coordinate of 0 to the y coordinate of the vertex, so a = 12. c is the number of units from the center to the foci, so c = 11. We need to find b now using the formula for the foci which is
![c^{2} = a^{2}- b^{2}](https://tex.z-dn.net/?f=%20c%5E%7B2%7D%20%3D%20a%5E%7B2%7D-%20b%5E%7B2%7D%20%20)
. We have c and a, so
![121=144- b^{2}](https://tex.z-dn.net/?f=121%3D144-%20b%5E%7B2%7D%20)
and
![b= \sqrt{23}](https://tex.z-dn.net/?f=b%3D%20%5Csqrt%7B23%7D%20)
. Now we have all the info we need to rewrite the equation:
![\frac{(x-0) ^{2} }{23} + \frac{(y-0) ^{2} }{144}=1](https://tex.z-dn.net/?f=%20%5Cfrac%7B%28x-0%29%20%5E%7B2%7D%20%7D%7B23%7D%20%2B%20%5Cfrac%7B%28y-0%29%20%5E%7B2%7D%20%7D%7B144%7D%3D1%20)
or, simplified,
Answer:
answer d: 5
Step-by-step explanation:
It will come out to a flat number like 10 20 30 40 ect and the counterfeit will have a 1 at the end such as 11 21 31 41.
Hope i Helped