展开全部

题目列表

题目内容

Quantity A

The number of real roots of $$2x- \frac{4}{7}$$=0

Quantity B

The number of real roots of $$2x^2 + \frac{4}{7}$$=0


How many distinct solutions does the equation $$|1-|x-215||=1$$ have?
When $$3^{64}$$ is divided by $$8$$, what is the remainder?
A team of two students from an art school is to be selected to represent the school at a national event. The two students will be selected from the students in three classes that have no students in common. The three classes have 10 students, 8 students, and 7 students. If the two students must be selected from different classes, how many teams are possible?


At an archaeological site, a level floor is marked with a square grid, as shown, where each square in the grid has dimensions $$5$$ feet by $$5$$ feet. Two small artifacts, $$A$$ and $$B$$, were found on the floor at the labeled points. Another small artifact, $$C$$, lies underground directly below $$B$$. If the distance between artifacts $$A$$ and $$C$$ is $$15$$ feet, how many feet below artifact $$B$$ is artifact $$C$$?

________ feet
A cord that is 20 meters long is cut into 4 pieces, no two of which are the same length.

Quantity A

The sum of the lengths of the longest and shortest pieces

Quantity B

9 meters


At a certain reception, 126 people are to be seated for dinner. The tables to be used for seating the people are available in two sizes, large and small, with seating capacities of 10 people and 8 people, respectively. If each table is to be filled to its respective seating capacity, what is the least number of small tables that must be used?
A bag contains 5 quarters, 10 nickels, and 15 dimes. If 4 of these coins are to be picked at random from the bag, without replacement, what is the probability of getting 4 quarters?
List K consists of 4 consecutive even integers, and list M consists of 7 consecutive odd integers. The greatest integer in list K is 5 less than the median of the integers in list M.

Quantity A

The range of the 11 integers of lists K and M combined

Quantity B

17


Each time a certain coin is tossed, the coin lands either heads up or tails up. For any given toss, the probability that the coin will land heads up is equal to the probability that the coin will land tails up. The coin is to be tossed $$n$$ times. What is the least possible value of $$n$$ such that the probability of the coin landing heads up $$n$$ times in a row is less than $$0.05$$?
From the time a manufacturer's assembly line begins operating for the day, an inspector checks every $$12^{th}$$ item as it comes off the line, beginning with the $$12^{th}$$ item, and another inspector checks every $$28^{th}$$ item, beginning with the 28th item. If the $$n^{th}$$ item coming off the line is the first item that is checked by both inspectors, what is the value of $$n$$?

$$n$$=__________
For people surveyed who are in the age-group 25-34 years, which of the following is closest to the ratio of the number of people who have $$5$$ or more servings of fruits and vegetables per day to the number of people who have $$4$$ or fewer servings of fruits and vegetables per day?
If there are $$200$$ people in the age-group 18- 24 years, approximately what percent of the people surveyed who eat $$5$$ or more servings of fruits and vegetables per day are in the age-group 18-24 years?
Among the people surveyed who eat $$1$$ or $$2$$ servings of fruits and vegetables per day. $$\frac{1}{5}$$ of the men and $$\frac{2}{7}$$ of the women are in the age- group 45-54 years. Which of the following is closest to the total number of people in the age-group 45-54 years?

共收录:

25000 +道题目

236本备考书籍

最新提问