28. Which best describes the point (4, -6) ?
A. It is 6 units above the x-axis and 4 units to the left of the y-axis.
B. It is 6 units below the x-axis and 4 units to the left of the y-axis.
C. It is 6 units above the x-axis and 4 units to the right of the y-axis.
D. It is 6 units below the x-axis and 4 units to the right of the y-axis.
29. Which of the following is a system of linear equations in two variables?
A.{2x=10
{ x-6y=6
B.{2x> 53y
{6y=6x
C.{x+y= 7
{2x- 6y < 4
D. {3 x + 5y = -2
{x - 6y= 6
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