Need help explaining the 3 errors that was made and pls show the work thank uuu!

Step-by-step explanation:

1.  The equation (-2x + 4y = 3) was supposed to be the product of (-x + 2y = 3) and 2.  But the correct result is:  (-2x + 4y = 6).

2.  The sum of (2x-5y=-3) and (-2x+4y=3) is NOT (-9y = -9).  It is (-y = 0).  But even this is useless since from point 1, the second equation is incorrect.  There are actually two errors in this step.  

  a) -5y + 4y = -y, not -9y

  b)  -3 + 3 = 0, not -9  

3.  Re-Do the problem

        2x - 5y = -3

        -x + 2y = 3

    -------------------------

        2x - 5y = -3

      -2x + 4y = 6     [Multiply by 2 and add to the first]

                -y   = 3

y = -3

If y = -3, then 2x - 5y = -3 becomes:

2x - 5(-3) = -3

2x + 15 = -3

2x = -18

  x = - 9

The solution is (-9,-3)

See the attachment

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:

77

step-by-step explanation: