Factor completely. If the polynomial is prime, state this.20(x - 1)2 + 21y(x - 1) - 5y2
A. (x - 1)(4y + 5)(5y - 1)
B. (4x - 4 + 5y)(5x - 5 - y)
C. (4x + 5y)(5x - y)
D. (4x - 4 - 5y)(5x - 5 + y)
Answer: B
Mathematics
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Evaluate the integral. 
A. -2sin-1
- x2
+ C
B. 4 sin-1
- 
+ C
C. 4 sin-1
- x
+ C
D. 
- 2 ln
+ C
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Solve the problem.Find the best buy and the unit price.Brand X 6 oz for $0.42Brand Y 8 oz for $0.64
A. Brand Y, $0.8 B. Brand X, $0.7 C. Brand Y, $0.7 D. Equal value
Mathematics
If the following defines a one-to-one function, find its inverse. If not, write "Not one-to-one."{(3, -5), (5, -3), (9, 2), (-9, -2)}
A. {(-2, 9), (-3, 5), (-5, 5), (2, -9)} B. {(-5, 3), (-3, 5), (2, 9), (-2, -9)} C. {(-2, 9), (9, 5), (-5, 3), (2, -9)} D. Not one-to-one
Mathematics
Use trigonometric identities to find the exact value.
A. - 
B. - 
C. -
D. -2
Mathematics