展开全部

题目列表

题目内容
A certain desk calendar shows the number of the day of the year and the number of days remaining in the year. If the calendar shows for Saturday, January 1, what does the calendar show for the Tuesday that is 20 weeks after the first Tuesday in January?

Set $$P$$ consists of all the integers from $$1$$ to $$100$$, inclusive. Which of the following sets contains the greatest number of integers?
The degree measure of each angle of a regular polygon with $$n$$ sides is between $$100$$ and $$130$$. Which of the following could be the value of $$n$$?

Indicate all such integers.

In the figure above, triangle ACD is equilateral. Which of the following lengths can be determined from the information given?
Indicate all such lengths.
If a=$$(-\frac{1}{37})^{12}$$, which of the following equals to $$37^{-12}$$?
$$y \gt |x|$$ and $$xy \lt 0$$

Quantity A

$$x+y$$

Quantity B

$$0$$


From 2002 to 2003, sales increased by 324%, while from 2002 to 2004, sales increased by 340%

Quantity A

The percent increase from 2003 to 2004

Quantity B

16%


A certain factory has 8 identical machines that process a certain chemical product at the same constant rate. If it takes 40 hours for 5 of the machines, working simultaneously at their constant rate, to process a totaI of one ton of the product, how many hours does it take the 8 machines, working simultaneously at their constant rate, to process a total of one ton of the product?

_____hours
Which of the following values of $$x$$ satisfies the equation $$\frac{x}{2}=n!$$ for some positive integer $$n$$?
List A: -8, -3, 5, 7, 14
List B: -3, 2, 10, 12, 19

Quantity A

The standard deviation of the numbers in list A

Quantity B

The standard deviation of the numbers in list B




The figure above shows a normal distribution with mean $$m$$ and standard deviation $$d$$, including approximate percents of the distribution corresponding to the six regions shown.

A survey of 5,500 book readers found that the number of books read per year was approximately normally distributed with mean 19.0 and standard deviation 2.0. Which of the following is the best description of the numbers of books read per year by the 880 book readers who read the most books?
On the number line, P is a point between -3 and -2, Q is a point between -1 and 0, and R is a point between 0 and 1.

Quantity A

The distance between P and Q

Quantity B

The distance between Q and R




△MNO is inscribed in semicircle MNO with radius $$r$$.

Quantity A

$$x^{2}$$+$$y^{2}$$

Quantity B

$$4r^{2}$$


If a two-digit number that has x as the tens digit and y as the units digit is multiplied by 5, then the value of the product is
For each value $$x$$ in a list of values with mean $$m$$, the absolute deviation of $$x$$ from the mean is defined as $$|x-m|$$.

A certain online course is offered once a month at a university. The number of people who register for the course each month is at least $$5$$ and at most $$30$$. For the past $$6$$ months, the mean number of people who registered for the course per month was $$20$$. For the numbers of people who registered for the course monthly for the past $$6$$ months, which of the following values could be the sum of the absolute deviations from the mean?

Indicate all such values.
$$n$$ is an integer such that $$111 \leq n \leq 114$$.

Quantity A

The remainder when $$n$$ is divided by $$31$$

Quantity B

$$16$$


If k and n are each positive integers between 12 and 30, then $$\frac{5+k}{7+n}$$will be equal to $$\frac{5}{7}$$for how many pairs of (k, n)?
$$|2x+7| < 13$$

Quantity A

$$x^{2}$$

Quantity B

9


By draining 40 gallons of water from a tank, the amount of water in the tank was decreased from $$\frac{1}{5}$$ of the tank 's full capacity to $$\frac{2}{11}$$ of the tanks full capacity. Water was then added to the tank until the tank was full. How many gallons of water were added to the tank?
Three printers, $$X_1$$, $$X_2$$ and $$X_3$$, work only at their respective constant rates. Working together,$$X_1$$, $$X_2$$ and $$X_3$$ can complete a certain job in 9 hours; working together, $$X_2$$ and $$X_3$$ can complete the same job in 12 hours. Working alone, how many hours will it take $$X_1$$ to complete the job?

共收录:

25000 +道题目

257本备考书籍

最新提问