Simplify the expression by combining like terms, if possible.6n + 4n6 + 4n + 5n6
A. 10n + 4n6 + 5
B. 6n + 9n6 + 4
C. 6n - 10n6
D. 10n + 9n6
Answer: D
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Solve the problem.Find the coordinates of the foci of the ellipse that is the intersection of z = 
+ 
with the plane z = 7.
A. (0, ±7, 7)
B. (0, ±
, 7)
C. (0, ±35, 7)
D. (0, 0, 7)
Find the work done by F over the curve in the direction of increasing t.F = 2yi + 
j + (3x + 3z)k; C: r(t) = ti + t2j + tk, 0 ? t ? 2
A. W = 22 + 20
B. W = 
+ 20
C. W = 
+ 
D. W = 0
The foci F1 and F2, the vertices V1 and V2, and the endpoints U1 and U2 of the minor axis are as labeled in the figure. Graph the ellipse and find its standard equation. (The coordinates of V1, V2, U1, and U2 are integers, and the coordinates of F1 and F2 are given.)
A. 
+ 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
+ 
= 1
Simplify the expression.
?
What will be an ideal response?