Factor completely. If the polynomial is prime, so state.3x2y - 9xy - 210y
A. 3y(x - 10)(x + 7)
B. 3y(x + 10)(x - 7)
C. 3y(x - 10)(x - 7)
D. 3y(x + 10)(x + 7)
Answer: A
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Write a system of equations for the problem, and then solve the system.Two trains start from towns 572miles apart and travel toward each other on parallel tracks. They pass each other 5.5 hours later. If one train travels 18 mph faster than the other, find the speed of each train.
A. 63 mph; 41 mph B. 61 mph; 43mph C. 51 mph; 53 mph D. 56 mph; 48 mph
Solve the problem.A square lawn has an area of 1152 square feet. A sprinkler placed at the center of the lawn sprays a water in a circular pattern that just covers the lawn. What is the radius of the circle?
A. 24 ft B. 48 ft C. 33.94 ft D. 16.97 ft
Determine whether the equation defines y as a function of x.|x| - y = 6
A. y is a function of x B. y is not a function of x
Solve the problem.Suppose that the annual consumption c (in gallons per person) of sports drinks in the United States can be modeled by the equation 
and that the U.S. population p (in millions) can be modeled by 
, where t is the number of years since 1990. Determine the total annual consumption of sports drinks in the U.S. in 1993.
A. 243,801,600 gal B. 163,104,000 gal C. 153,564,000 gal D. 249,504,000 gal