InterviewSolution
Saved Bookmarks
| 1. |
{{:(5x-3y=10),(6y=kx-42):} In the system of linear equations above, k represents a constant. If the system of equations has no solution, what is the value of 2k? |
|
Answer» `5/2` `kx - 6y=42` The y-coefficient in the first equation, `5x-3y=10, is 3.` Divide the second equation by 2 in ORDER to make the y-coefficients in both equatinos equal: `k/2x -3y=21` Now set the x-coefficient equal to the x-coefficient in the first equation: ` k /2=5` `k=10` Note that the question asks for the value of 2K, so the correct answer is (D), 20. |
|