Find the center, foci, and vertices of the ellipse.4x2 + 5y2 - 40x + 40y + 160 = 0
A. 
+ 
= 1
center: (5, -4); foci: (6, -4), (4, -4); vertices: (7.2, -4), (2.8, -4)
B. 
+ 
= 1
center: (5, -4); foci: (6, -4), (4, -4); vertices: (7.2, -4), (2.8, -4)
C. 
+ 
= 1
center: (-5, 4); foci: (-4, 4), (-6, 4); vertices: (-7.2, 4), (-2.8, 4)
D. 
+ 
= 1
center: (-5, 4); foci: (-4, 4), (-6, 4); vertices: (-7.2, 4), (-2.8, 4)
Answer: A
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Suppose that the functions f and g and their derivatives with respect to x have the following values at the given values of x. Find the derivative with respect to x of the given combination at the given value of x.
, x = 3
A. 
B. 
C. 
D. - 
Divide.
÷ 
A. - 1
B. 
C. - 
D. - 34
Solve the problem.In a chemistry class, 8 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 4.0 L B. 5.0 L C. 3.0 L D. 8.0 L
Verify the identity.
= 
What will be an ideal response?