The answer to that is - 10
The correct answer is A. Each of the y values are 4 times their respective x values
Answer:
the correct answer will be B i took the test and got a 100%
Step-by-step explanation:
B. Lemon Brown has lived a more exciting life of a musician, while Greg’s father lives a more stable existence as a postal worker.
Answer:
First image attached
The error was done in Step E, because student did not multiply
by the negative sign in numerator. Step E must be
.
Second image attached
The error was done in Step C, because the student omitted the
of the algebraic identity
. Step C must be ![5\cdot x = x^{2}+4\cdot x + 4](https://tex.z-dn.net/?f=5%5Ccdot%20x%20%3D%20x%5E%7B2%7D%2B4%5Ccdot%20x%20%2B%204)
Step-by-step explanation:
First image attached
The error was done in Step E, because student did not multiply
by the negative sign in numerator. The real numerator in Step E should be:
![3-(2\cdot x -8)= 3-2\cdot x+8 = 11-2\cdot x](https://tex.z-dn.net/?f=3-%282%5Ccdot%20x%20-8%29%3D%203-2%5Ccdot%20x%2B8%20%3D%2011-2%5Ccdot%20x)
Hence, Step E must be
.
Second image attached
The error was done in Step C, because the student omitted the
of the algebraic identity
. Step C must be ![5\cdot x = x^{2}+4\cdot x + 4](https://tex.z-dn.net/?f=5%5Ccdot%20x%20%3D%20x%5E%7B2%7D%2B4%5Ccdot%20x%20%2B%204)
And further steps are described below:
Step D
![x^{2}-x+4 = 0](https://tex.z-dn.net/?f=x%5E%7B2%7D-x%2B4%20%3D%200)
Which according to the Quadratic Formula, represents a polynomial with complex roots. That is: (
,
,
)
![D = b^{2}-4\cdot a\cdot c](https://tex.z-dn.net/?f=D%20%3D%20b%5E%7B2%7D-4%5Ccdot%20a%5Ccdot%20c)
![D = (-1)-4\cdot (1)\cdot (4)](https://tex.z-dn.net/?f=D%20%3D%20%28-1%29-4%5Ccdot%20%281%29%5Ccdot%20%284%29)
(Conjugated complex roots)
Step E
![(x-0.5-i\,1.936)\cdot (x-0.5+i\,1.936) = 0](https://tex.z-dn.net/?f=%28x-0.5-i%5C%2C1.936%29%5Ccdot%20%28x-0.5%2Bi%5C%2C1.936%29%20%3D%200)
Step F
![x = 0.5+i\,1.936\,\lor\,x = 0.5-i\,1.936](https://tex.z-dn.net/?f=x%20%3D%200.5%2Bi%5C%2C1.936%5C%2C%5Clor%5C%2Cx%20%3D%200.5-i%5C%2C1.936)
I have no idea how to do this problem i dont know what a is