500/20 = 25kcal per piece
8 * 25 = 200kcal.....yes, he is able to have 8 pieces
Answer:
1000
Step-by-step explanation:
Answer:
![A = \int\limits^3__-3}{9}-{x^{2}} \, dx = 36](https://tex.z-dn.net/?f=A%20%3D%20%5Cint%5Climits%5E3__-3%7D%7B9%7D-%7Bx%5E%7B2%7D%7D%20%5C%2C%20dx%20%3D%2036)
Step-by-step explanation:
The equations are:
![y = x^{2} + 2x + 3](https://tex.z-dn.net/?f=y%20%3D%20x%5E%7B2%7D%20%2B%202x%20%2B%203)
![y = 2x + 12](https://tex.z-dn.net/?f=y%20%3D%202x%20%2B%2012)
The two graphs intersect when:
![x^{2} + 2x + 3 = 2x + 12](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B%202x%20%2B%203%20%3D%202x%20%2B%2012)
![x^{2} = 0](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%3D%200)
![x_{1} = 3\\x_{2} = -3](https://tex.z-dn.net/?f=x_%7B1%7D%20%20%3D%203%5C%5Cx_%7B2%7D%20%20%3D%20-3)
To find the area under the curve for the first equation:
![A_{1} = \int\limits^3__-3}{x^{2} + 2x + 3} \, dx](https://tex.z-dn.net/?f=A_%7B1%7D%20%3D%20%5Cint%5Climits%5E3__-3%7D%7Bx%5E%7B2%7D%20%2B%202x%20%2B%203%7D%20%5C%2C%20dx)
To find the area under the curve for the second equation:
![A_{2} = \int\limits^3__-3}{2x + 12} \, dx](https://tex.z-dn.net/?f=A_%7B2%7D%20%3D%20%5Cint%5Climits%5E3__-3%7D%7B2x%20%2B%2012%7D%20%5C%2C%20dx)
To find the total area:
![A = A_{2} -A_{1} = \int\limits^3__-3}{2x + 12} \, dx -\int\limits^3__-3}{x^{2} + 2x + 3} \, dx](https://tex.z-dn.net/?f=A%20%3D%20A_%7B2%7D%20-A_%7B1%7D%20%3D%20%5Cint%5Climits%5E3__-3%7D%7B2x%20%2B%2012%7D%20%5C%2C%20dx%20-%5Cint%5Climits%5E3__-3%7D%7Bx%5E%7B2%7D%20%2B%202x%20%2B%203%7D%20%5C%2C%20dx)
Simplifying the equation:
![A = \int\limits^3__-3}{2x + 12}-({x^{2} + 2x + 3}) \, dx = \int\limits^3__-3}{9}-{x^{2}} \, dx](https://tex.z-dn.net/?f=A%20%3D%20%5Cint%5Climits%5E3__-3%7D%7B2x%20%2B%2012%7D-%28%7Bx%5E%7B2%7D%20%2B%202x%20%2B%203%7D%29%20%5C%2C%20dx%20%3D%20%5Cint%5Climits%5E3__-3%7D%7B9%7D-%7Bx%5E%7B2%7D%7D%20%5C%2C%20dx)
Note: The reason the area is equal to the area two minus area one is that the line, area 2, is above the region of interest (see image).
For the first 1 X= 11 because all you need to do is add or subtract the numbers visible.
The second would be 2.
None of them will get into a negative number. When you have like "2x" is the number twice, right? Some number has to be negative