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Working at a constant rate, a copy machine makes 20 copies of a onepage document per minute. If the machine works at this constant rate, how many hours does it take to make 4,800 copies of a onepage document?
If x + y = 2 and x^{2} + y^{2} = 2, what is the value of xy ?
PS11042
The sum S of the first n consecutive positive even integers is given by S = n(n + 1). For what value of n is this sum equal to 110 ?
(PS02978)
A certain harbor has docking stations along its west and south docks, as shown in the figure; any two adjacent docking stations are separated by a uniform distance d. A certain boat left the west dock from docking station #2 and moved in a straight line diagonally until it reached the south dock. If the boat was at one time directly east of docking station #4 and directly north of docking station #7, at which docking station on the south dock did the boat arrive?
(PS08375)
6(87.30+0.65)−5(87.30)=
(PS03887)
Points A, B, C, and D, in that order, lie on a line. If AB = 3 cm, AC = 4 cm, and BD = 6 cm, what is CD, in centimeters?
PS13800
What is the value of x^{2}yz − xyz^{2}, if x = − 2, y = 1, and z = 3?
PS05292
A souvenir vendor purchased 1,000 shirts for a special event at a price of $5 each. The vendor sold 600 of the shirts on the day of the event for $12 each and 300 of the shirts in the week following the event for $4 each. The vendor was unable to sell the remaining shirts. What was the vendor’s gross profit on the sale of these shirts?
(PS11468)
If x > y and y > z, which of the following represents the greatest number?
PS06937
To order certain plants from a catalog, it costs $3.00 per plant, plus a 5 percent sales tax, plus $6.95 for shipping and handling regardless of the number of plants ordered. If Company C ordered these plants from the catalog at the total cost of $69.95, how many plants did Company C order?
PS12926