Expand.(x3 - 2y2)5
A. x15 - 2x12y2 + 4x9y4 - 8x6y6 + 16x3y8 - 32y10
B. x15 - 10x7y2 + 40x6y4 - 80x5y5 + 80x3y6 - 32y7
C. x15 - 10x12y2 + 40x9y4 - 80x6y6 + 80x3y8 - 32y10
D. x15 - 32y10
Answer: C
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with vertices (±6, 0) and foci at (±5, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Evaluate the expression.
A. - 
B. - 
C. Undefined
D. - 
Find the standard deviation.The management of an amusement park wanted to determine the amount of waiting time for the park's oldest roller coaster. The following data represents a random sample of waiting times in minutes (rounded to the nearest minute): 14 7 11 15 17 7 7 11 13What is the standard deviation? Round your answer to one decimal place.
A. 3.5 min B. 3.7 min C. 4.0 min D. 1.4 min
Perform the indicated operations.(-6x2y + 7xy2 - 3xy + 7) + ( -2x2y - 3xy2 + 5xy - 10)
A. -8x2y + 4xy2 + 2xy - 3 B. 8x2y - 4xy2 - 2xy - 3 C. -15x2y2 - 3 D. -7x2y - 2xy2 - 4