Answer:
Option D
Explanation:
This question is incomplete; here is the complete question.
Which system is equivalent to
5x² + 6y² = 50
7x² + 2y² = 10
A. 5x² + 6y² = 50
-21x²- 6y² = 10
B. 5x² + 6y² = 50
-21x²- 6y² = 30
C. 35x²+ 42y² = 250
-35x²- 10y² = -50
D. 35x² + 42y² = 350
-35x²- 10y² = -50
In this question system of equations have been given as
5x² + 6y² = 50 --------(1)
7x² + 2y² = 10 ---------(2)
To solve these equations multiply the equation (2) by (-5)
-35x² - 10y² = -50 --------(3)
and multiply equation (1) by 7
35x²+ 42y² = 350 ---------(4)
Therefore, system of equations (3) and (4) are the equivalent to the parent system.
This system matches with Option D.
Therefore, Option D is the answer.