In the xy-plane, the points (c,d), (c,-d), and (-c,-d) are three vertices of a certain square. If c < 0 and d > 0, which of the following points is in the same quadrant as the fourth vertex of the square?

What is the greatest number of identical bouquets that can be made out of 21 white and 91 red tulips if no flowers are to be left out? (Two bouquets are identical whenever the number of red tulips in the two bouquets is equal and the number of white tulips in the two bouquets is equal.)

Jonah drove the first half of a 100-mile trip in x hours and the second half in y hours.

Which of the following is equal to Jonah's average speed, in miles per hour, for the entire trip?

A certain clock marks every hour by striking a number of times equal to the hour, and the time required for a stroke is exactly equal to the time interval between strokes. At 6:00 the time lapse between the beginning of the first stroke and the end of the last stroke is 22 seconds. At 12:00, how many seconds elapse between the beginning of the first stroke and the end of the last stroke?

Company K's earnings were $12 million last year. If this year's earnings are projected to be 150 percent greater than last year's earnings, what are Company K's projected earnings this year?

On the number line, if r < s, if p is halfway between r and s, and if t is halfway between p and r,

then~$s-t \over t-r$~=

If a, b, and c are constants, a > b > c, and x³ - x = (x - a)(x - b)(x - c) for all numbers x, what is the value of b ?

In the coordinate plane, line k passes through the origin and has slope 2. If points

(3,y) and (x,4) are on line k, then x + y =

A corporation that had $115.19 billion in profits for the year paid out $230.10 million in employee benefits. Approximately what percent of the profits were the employee benefits? (Note: 1 billion = 10⁹)