Write two equivalent expressions for the opposite of the polynomial.4x5y3 - 9x5y + 10x4y - 4x3
A. (-4x5y3 - 9x5y + 10x4y - 4x3),
-4x5y3 + 9x5y - 10x4y + 4x3
B. -(4x5y3 - 9x5y + 10x4y - 4x3),
-4x5y3 + 9x5y - 10x4y + 4x3
C. -(-4x5y3 + 9x5y - 10x4y + 4x3),
-4x5y3 - 9x5y + 10x4y - 4x3
D. None of these
Answer: B
Mathematics
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Solve using matrices.6x + 8y = 89x - 3z = -136y - 3z = 11
A. 
B. 
C. 
D. 
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Simplify.
A. 2
B. 
C. 
D. 
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Perform the indicated operation.
- 
A. 
B. 8
C. 
D. 
Mathematics
A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 22 mpg and a standard deviation of 4 mpg. Find the probability that a car selected at random has gas mileage less than 21 mpg. Round your answer to four decimal places. ?
A. 0.4013 B. 0.9013 C. 0.0987 D. 0.5987 E. 0.1974
Mathematics