Answer:
Step-by-step explanation:
The four steps of linear combination method are
1) Rearrange like terms such that they are in the same column.
2) The next step is to decide on which variable you want to eliminate and multiply each row with suitable numbers that would make the coefficient of the variable to be equal and opposite.
3) Add both rows and solve for the other unknown variable.
4) substitute the known variable into any of the equations and solve for the other variable.
4x + 2y = 5
−4x − 5y = 7
We would eliminate x by adding both equations. It becomes
- 3y = 12
y = 12/- 3 = - 4
Substituting y = - 4 into the first equation, it becomes
4x + 2 × - 4 = 5
4x - 8 = 5
4x = 5 + 8 = 13
x = 13/4 = 3.25
The answer is A. You need an additional angle and the side must be between the two angles. It's called the 'included' side.
ASA means Angle, Side, Angle
The answer would be the one with the check mark right
Your answer would be 2x^2y(x^2y^2-6xy-4)
Answer:
x=4,y=9
Step-by-step explanation:
We want to solve the equation:
![2y - 5x = - 2](https://tex.z-dn.net/?f=2y%20-%205x%20%3D%20%20-%202)
![3y + 2x = 35](https://tex.z-dn.net/?f=3y%20%2B%202x%20%3D%2035)
simultaneously.
Multiply the top equation by 3 and the bottom equation by 2 to get:
6y-15x=-6
6y+4x=70
Subtract the top equation from the bottom equation.
![4x - - 15x = 70 - - 6](https://tex.z-dn.net/?f=4x%20-%20%20-%2015x%20%3D%20%2070%20-%20%20-%206)
![19x = 76](https://tex.z-dn.net/?f=19x%20%3D%2076)
![x = \frac{76}{19}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B76%7D%7B19%7D%20)
![x = 4](https://tex.z-dn.net/?f=x%20%3D%204)
We substitute x=4 into 2y-5x=-2 to get:
![2y - 5(4) = - 2](https://tex.z-dn.net/?f=2y%20-%205%284%29%20%3D%20%20-%202)
![2y = - 2 + 20 = 18](https://tex.z-dn.net/?f=2y%20%3D%20%20-%202%20%2B%2020%20%3D%2018)
![y = \frac{18}{2} = 9](https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%7B18%7D%7B2%7D%20%20%3D%209)
Therefore the solution to the system is
(4,9)