Find the standard-form equation for an ellipse which satisfies the given conditions.An ellipse centered at the origin having focus (
, 0) and directrix x = 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ y2 = 1
D. 
+ 
= 1
Answer: D
Mathematics
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Solve the system of equations using the inverse of the coefficient matrix. 5x - y + 4z = 55 3x - 5z = 124y + z = 11
A. No solution B. x = 9, y = 2, z = 3 C. x = -9, y = 2, z = 18 D. x = 9, y = 3, z =2
Mathematics
Provide an appropriate response.The studs of an outside wall are 
in. thick. The inside wallboard is 
in. thick and the outside covering is 
in. thick. What is the total thickness of the wall?
A. 
in.
B. 
in.
C. 
in.
D. 
in.
Mathematics
Find the product.(6xy2 - 5y)(6xy2 + 5y)
A. 36x2y4 - 60xy3 - 25y2 B. 36x2y4 + 25y2 C. 36xy2 - 25y D. 36x2y4 - 25y2
Mathematics
Solve the problem.Find the scale factor of the dilation shown below.
A. 
B. 
C. 
D. 
Mathematics