#### 题目列表

A certain store sells two types of pens: one type for $2 per pen and the other type for$3 per pen. If a customer can spend up to $25 to buy pens at the store and there is no sales tax, what is the greatest number of pens the customer can buy? If y = 3x and z = 2y, what is x + y + z in terms of x ? A certain shipping service charges an insurance fee of$0.75 when shipping any package with contents worth $25.00 or less and an insurance fee of$1.00 when shipping any package with contents worth over $25.00. If Dan uses the shipping company to ship three packages with contents worth$18.25, $25.00, and$127.50, respectively, what is the total insurance fee that the company charges Dan to ship the three packages?

In the rectangular solid above, TU = 3, UV = 4, and VR = 2. What is the area of the shaded rectangular region?

_____
A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x ?

x = _____
The circle graph above shows the distribution of 200,000 physicians by specialty. Which of the following sectors of the circle graph represent more than 40,000 physicians?

Indicate all such sectors.
Machine R, working alone at a constant rate, produces x units of a product in 30 minutes, and machine S, working alone at a constant rate, produces x units of the product in 48 minutes, where x is a positive integer.

#### Quantity A

The number of units of the product that machine R, working alone at its constant rate, produces in 3 hours

#### Quantity B

The number of units of the product that machine S, working alone at its constant rate, produces in 4 hours

List X and list Y each contain 60 numbers. Frequency distributions for each list are given above. The average (arithmetic mean) of the numbers in list X is 2.7, and the average of the numbers in list Y is 7.1. List Z contains 120 numbers: the 60 numbers in list X and the 60 numbers in list Y.

#### Quantity A

The average of the 120 numbers in list Z

#### Quantity B

The median of the 120 numbers in list Z

In the figure above, the diameter of the circle is 10.

#### Quantity B

40

Among the 9,000 people attending a football game at College C, there were x students from College C and y students who were not from College C.

#### Quantity A

The number of people attending the game who were not students

#### Quantity B

9,000 - x - y

If$x \neq 0$, which of the following is equivalent to $x(x^{2})^{3}\over{x^{2}}$
The figure above shows the graph of the function f in the xy-plane. What is the value of f (f (-1)) ?
If $\frac{(d-3n)}{(7n-d)}=1$,which of the following statements describes d in terms of n ?
By weight, liquid A makes up 8 percent of solution R and 18 percent of solution S. If 3 grams of solution R are mixed with 7 grams of solution S, then liquid A accounts for what percent of the weight of the resulting solution?
Of the 700 members of a certain organization, 120 are lawyers. Two members of the organization will be selected at random. Which of the following is closest to the probability that neither of the members selected will be a lawyer?
The figure above represents a rectangular garden with a walkway around it. The garden is 18 feet long and 12 feet wide. The walkway is uniformly 3 feet wide, and its edges meet at right angles. What is the area of the walkway?

_____square feet
Line k lies in the xy-plane. The x-intercept of line k is -4, and line k passes through the midpoint of the line segment whose endpoints are (2, 9) and (2, 0). What is the slope of line k ?

_____/_____
If the lengths of two sides of a triangle are 5 and 9, respectively, which of the following could be the length of the third side of the triangle?

Indicate all such lengths.
On the number line shown above, the tick marks are equally spaced. Which of the following statements about the numbers x, y, and z must be true?

Indicate all such statements.

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