Machine A produces 100 parts twice as fast as machine B does. Machine B produces 100 parts in 40 minutes. If each machine produces parts at a constant rate, how many parts does machine A produce in 6 minutes?

A necklace is made by stringing N individual beads together in the repeating pattern red bead, green bead, white bead, blue bead, and yellow bead. If the necklace design begins with a red bead and ends with a white bead, then N could equal

If x = (0.08)², y = 1/(0.08)², and z = (1 – 0.08)² – 1, which of the following is true?

In 1990 a total of x earthquakes occurred worldwide, some but not all of which occurred in Asia. lf m of these earthquakes occurred in Asia, which of the following represents the ratio of the number of earthquakes that occurred in Asia to the number that did not occur in Asia?

In 1985 a company sold a brand of shoes to retailers for a fixed price per pair. In 1986 the number of pairs of the shoes that the company sold to retailers decreased by 20 percent, while the price per pair increased by 20 percent. If the company’s revenue from the sales of the shoes in 1986 was $3.0 million, what was the approximate revenue from the sale of the shoes in 1985?

A car dealer sold x used cars and y new cars during May. If the number of used cars sold was 10 greater than the number of new cars sold, which of the following expresses this relationship?

lf a 10 percent deposit that has been paid toward the purchase of a certain product is $110, how much more remains to be paid?

Kim purchased n items from a catalog for 98 each. Postage and handling charges consisted of$3 for the first item and $1 for each additional item. Which of the following gives the total dollar amount of Kim’s purchase, including postage and handling, in terms of n?