Find the product.(4x - 5y)(5x - 10y)
A. 20x2 - 40xy + 50y2
B. 20x2 - 65xy + 50y2
C. 20x2 - 25xy + 50y2
D. 20x2 - 65xy - 65y2
Answer: B
Mathematics
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Reduce the index of the radical.
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A. 
B. 
C. 
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Mathematics
Solve the problem.A mother with 8 children takes 4 of them at a time to the amusement park, without taking the same 4 children more than once. What is the maximum number of times each child will go to the amusement park?
A. 70 B. 210 C. 56 D. 35
Mathematics
Determine the slope and y-intercept of the function.p(x) = -x - 3
A. m = -1; b = 3 B. m = -1; b =-3 C. m =1; b = 3 D. m = 0; b = -3
Mathematics
Find the mean and standard deviation of the specified probability density function.f(x) = e-x for [0, ?)
A. ? = 1, ? = 1 B. ? = 0.5, ? = 1 C. ? = 10, ? = 10 D. ? = 0.5, ? = 0.5
Mathematics