Find the center, vertices, and foci of the ellipse with the given equation.
+ 
= 1
A. Center: (0, 0); Vertices: (-10, 0), (10, 0); Foci: (-8, 0), (8, 0)
B. Center: (0, 0); Vertices: (0, -10), (0, 10); Foci: (0, -6), (0, 6)
C. Center: (0, 0); Vertices: (0, -10), (0, 10); Foci: (0, -8), (0, 8)
D. Center: (0, 0); Vertices: (-10, 0), (10, 0); Foci: (-6, 0), (6, 0)
Answer: A
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Simplify the expression by combining like terms.-1.2x3 - 1.5x3 - 0.4x3
A. -4.3x3 B. -15x3 C. Cannot be simplified D. -3.1x3
Solve the problem.42.5% of the students at a certain college are men. If the total number of students at the college is 1600, how many female students are there?
A. 920 B. 940 C. 800 D. 680
Simplify the expression. Assume that all variables are positive when they appear.
? 
A. -20x B. 20x C. -1x D. 9x
Answer the question or write an explanation.Are the expressions 
and 
equal?
What will be an ideal response?