Which system is equivalent to 5x^2+6y^2=50 7x^2+2y^2=10

Option D

Step-by-step 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.

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is symmetric about the line y = 120,000.

step-by-step explanation: