Answer:

Step-by-step explanation:
40ab is 40 multiplied by a multiplied by b
Step-by-step explanation:

10x - 12 + 10 = 18 - 20
10x - 2 = -2
10x = 0
x = 0
Answer:
Option D (7, -3)
Step-by-step explanation:
We know that the general equation of an ellipse has the form:

Where the point (h, k) are the coordinates of the center of the ellipse
In this case the equation of the ellipse is:

Then

So The coordinates of the center of the ellipse are (7, -3)