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题目内容
w, x, y, and z are consecutive positive multiples of 6.

Quantity A

$$\frac{w+z}{2}$$

Quantity B

$$x+\frac{z-y}{2}$$
x is even, y is odd, which of the following could be even?

Indicate all such statements.
x, y, z are consecutive positive integers and x < y < z.

Quantity A

$$(\frac{1}{x}-\frac{1}{y})^{-1}$$

Quantity B

$$(\frac{1}{y}-\frac{1}{z})^{-1}$$
x ≠ 0

Quantity A

The average (arithmetic mean) of the numbers x, -x, and |x|

Quantity B

x
According to a survey of 300 college students, 40 percent had students loans and 25 percent had scholarships. If 55 percent of the students surveyed had neither student loans nor scholarships, how many of the students had both student loans and scholarships?
In a barrel, there are in ping-pong balls labeled with consecutive integers from 1 to n, where n is an odd integer greater than 50. If a ball is to be randomly selected from the barrel, what is the probability that the ball selected will be a ball that is labeled with an odd integer?


What is the perimeter of the shaded region of the rectangle shown above if each of the unshaded regions is a 90-degree sector of a circle with radius r?
A rectangular garden has a diagonal that is 26 feet long. If one side of the garden is between 8 feet and 12 feet long, which of the following values could be thearea, in square feet, of the garden?

Indicate all such values.


If $$\frac{1}{2}$$ of the revenue from the sale of jazz recordings was from the sale of vocal jazz recordings, then revenue from vocal jazz recordings was approximately what fraction of revenue from all vocal recordings?


The graphs shown are drawn to scale. Which of the following is closest to the degree measure of the central angle of the sector that represents the category labeled "Other"?


If in 1995 revenue from the sale of classical music recordings was $$\frac{1}{2}$$ of its 1994 value while revenue from the sale of all other recordings shown was the same as in 1994, approximately what percent of the total 1995 revenue was from the sale of classical music recordings?
The graph of line k in the xy-plane has an x-intercept of -5 and a slope of $$-\frac{3}{2}$$. If k passes through the point (2, c), what is the value of c?
In an appliance store, the ratio of the number of radios in stock to the number of television sets in stock is 0.4. Exactly 10 radios and x television sets are added to the appliances in stock, and the ratio of radios to television sets in stock remains at 0.4.

Quantity A

x

Quantity B

30
y is a positive even integer.

Quantity A

x+y

Quantity B

x+1
For all x, $$x^{2}+4x-12 = (x-r)(x+s)$$, where r > 0 and s > 0.

Quantity A

r

Quantity B

s
x and y are integers and 0 < x < y.

Quantity A

$$x^{y}$$

Quantity B

$$y^{x}$$


O is the center of the circle, and OA = BC.

Quantity A

The measure of angle ABC

Quantity B

60°
List L: 84, 73, 87, 88, 75, 90

The standard deviation of the numbers in list L is s. List M consists of 6 different numbers, each of which is obtained by adding 9 to one of the numbers in list L. The standard deviation of the numbers in list M is t.

Quantity A

s+3

Quantity B

t
Two sides of a right triangle have lengths of 5 and 10, respectively.

Quantity A

The length of the third side of the triangle

Quantity B

11
$$\frac{(2+\frac{1}{2})^{4}-2^{4}}{(2+\frac{1}{2})^{2}+2^{2}}$$=

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