Factor completely. If unfactorable, indicate that the polynomial is prime.125x2 - 200xy + 80y2
A. 5( x - 4y)(x + 4y )
B. 5(5x + 4y)2
C. 5(25x2 - 40xy + 16y2)
D. 5(5x - 4y)2
Answer: D
Mathematics
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Substitute to find the value of the expression.A train must cover a distance of 2520 miles. The velocity, in miles per hour, of the train is 
where t is the time, in hours, to complete the trip. If the train completes the trip in 28 hours, what is its velocity?
A. 0.01 mph B. 90 mph C. 85 mph D. 70,560 mph
Mathematics
Evaluate the expression without a calculator.-4-3
A. 
B. -64
C. 64
D. - 
Mathematics
Sketch the graph of the function.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Choose the graph that matches the given function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics