Key to the Practice Midterm

Problem 1

Center:  (-2,3)    Vertices:  (-2,5),(-2,1)    Foci:  (-2,3+(sqrt10)/3),  (-2,3-(sqrt10)/3)

Problem 2

x²/5.54x10¹⁰ + y²/5.55x10¹⁰ = 1

Problem 3

(2,4)

Problem 4

Open for boarders only with 1800 acres for these boarders.

Problem 5

A.  

0	1	0
2x	3x-1	5x

B.  wrong dimensions

C.  Wrong dimensions

D.  x

E.  Not square

F.    

-1	0
-3+x	x-2x2

Problem 6

A.  True, since detA = cdetB so that detB is nonzero.

B.  False, it is an ellipse.