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题目内容
A car travels d miles along a stretch of highway at a constant speed of r miles per hour and then travels d miles back to its starting point at a constant speed of s miles per hour, where r > s .

Quantity A

The time taken by the car to travel the d miles at r miles per hour

Quantity B

$$\frac{d}{s}$$ hours
-10< x+y< 20

5< x< 10

Quantity A

y

Quantity B

-15
R=$$(2^{16})(5^{34})(N^{50})$$,where N is a positive integer.

Quantity A

$$\sqrt{R}$$

Quantity B

$$\frac{R}{10}$$
2s=r+t

Quantity A

The median of r, s, and t

Quantity B

s
A copy machine was used to produce two smaller versions of a rectangular picture. Each dimension of the original picture was reduced by 20 percent to produce the first smaller version, and then each dimension of the first smaller version was reduced by 15 percent to produce the second smaller version. Each dimension of the second smaller version was what percent of the corresponding dimension of the original picture?
A metal right circular cylinder is 20 centimeters tall, has a base with diameter 8 centimeters, and is open at both ends. Which of the following is closest to the outside surface area of the cylinder, in square centimeters?


Matt has 10 coins, and their values are shown in the table. If Matt randomly selects 4 of the coins, which of the following could be the total value of the 4 coins?

Indicate all such values.
If$$\frac{x+1}{6x}+\frac{x+1}{2x}=1$$ , what is the value of x ?

x=_____
x,12,11

If the standard deviation of the three numbers in the list above is 4, what is the standard deviation of x+9, 21, and 20 ?
According to a projection made in January 2016, for each of the three years following 2015, annual sales would increase by an amount equal to $$\frac{1}{2}$$ of the increase in annual sales from 2014 to 2015. According to this projection, approximately what would annual sales be for the year 2018 ?
Based on the information given, which of the following statements are true?

Indicate all such statements.
The number of stores owned by Star Discount in 2015 was twice the number owned by Star Discount in 2010. By approximately what percent did the average annual earnings per store increase from 2010 to 2015 ?
In a certain list of positive integers, the ratio of the number of odd integers to the number of even integers is 7 to 4. One-fourth of the number of odd integers is what fraction of the total number of integers in the list?
If the circumference of a circle is 6, what is the area of the circle?
In the xy-plane, the graph of the equation y=$$-\frac{1}{2}x+3$$ passes through the point (c,-c). What is the value of c ?
On a final exam, 75 percent of a class had scores that were greater than 70, and 60 percent of the class had scores that were less than 85. What percent of the class had scores that were greater than 70 but less than 85 ?

_____%


The area of the shaded region inside rectangle RSTW is 28.

Quantity A

The sum of the areas of the unshaded regions inside rectangle RSTW

Quantity B

42


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List K consists of 10 numbers whose standard deviation is 7.

List M is formed by adding 3 to each number in list K.

Quantity A

The standard deviation of the numbers in list M

Quantity B

7

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