展开全部

题目列表

题目内容
n > 1

Quantity A

The product of ($$\sqrt{n+1}-\sqrt{n-1}$$) and ($$\sqrt{n+1}+\sqrt{n-1}$$)

Quantity B

2






If 20 percent of the amount budgeted for vacation had instead been added to the amount budgeted for entertainment, which of the following is closest to the percent by which the amount budgeted for entertainment would have increased?
The three children in the Alden family contributed 30 percent of the amount budgeted for savings. The oldest child contributed $150 more than the youngest child, and the middle child contributed $60 more than the youngest child. What was the median of the amounts that the children contributed to savings ?
In each of the years after year X, the Alden family budgeted $200 more for savings than it budgeted for savings the previous year. What is the total amount that the Alden family budgeted for savings over the 10 years beginning with year X?
Motorcycle riders in London have discovered an ingenious, albeit ____________, way of parking illegally without getting a ticket.
Influenza is ____________ virus: it is full of surprises and newness, prone to mutation and reassortment.
In 1998, observations of a (i)____________ in the growth of atmospheric methane, a potent greenhouse gas, suggested that many of the scenarios for global warming provided in a 1995 assessment may have been overly (ii)____________. Celebration was, however, premature: subsequent research has established that the observed phenomena were likely caused by (iii)____________ declines in industrial and natural emissions.
The author mentions the "cohort" primarily to
The argument is vulnerable to criticism on the ground that it
n=9.99999

The number k is the value of n rounded to the nearest tenth, and the number m is the value of n rounded to the nearest thousandth.

Quantity A

k

Quantity B

m




In a group of people, 30 people speak French, 40 speak Spanish, and $$\frac{1}{2}$$ of the people who speak Spanish do not speak French. If each person in the group speaks French, Spanish, or both, which of the following statements are true?

Indicate all such statements.
If $$x=(96,538)(701,865)$$, then $$x$$ is between?
A certain experiment has exactly two mutually exclusive outcomes with probabilities p and 2p.

Quantity A

p

Quantity B

1-p




In a list of 25 different numbers, the average (arithmetic mean) of all the numbers greater than the median is 200, and the average of all the numbers less than the median is 100. If the average of the 25 numbers is an integer, which of the following could be the value of the median?

Indicate all such values.


In a set of cards, each card is colored one of three colors and each card is labeled with one letter as indicated in the table. If one card is to be selected at random from the set, what is the probability that the selected card will be blue or labeled with the letter W?


The figure above represents the floor plan of a basement in which all the walls meet at right angles. The measurements shown in the floor plan, including the two sides of length x, are in centimeters. The floor plan is drawn using a scale of 1 centimeter to 1.5 meters. If the perimeter of the floor is 39.4 centimeters, approximately what is the area, in square meters, of the basement floor?


As part of a study, a restaurant recorded the number of people for each reservation at the restaurant last Saturday. The table above shows a frequency distribution of the results. What is the range of the numbers of people per reservation?

_____people per reservation
If x and y are positive integers and x + y = 8x + 22, which of the following must be true?
For which of the first five years shown was the total annual per capita consumption of coffee and ice cream combined closest to the annual per capita consumption of poultry?
The population of the United States was approximately 106 million in 1920 and approximately 249 million in 1990. Based on these population estimates, approximately how many million pounds greater was the total annual consumption of cheese in 1990 than in 1920?

共收录:

25000 +道题目

199本备考书籍

最新提问