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题目内容
If the x-intercept of line l is -4,and the y-intercept of line l is 3,what is the slope of line l?
Give your answer as a
fraction.
The parabola in the xy-plane above is the graph of the equation $$y = ax^{2}$$ + bx+ c, where a, b, and c are constants. Which of the following statements must be true?
Indicate
all
such statements.
The figure consists of 14 identical equilateral triangular regions. If the area of the figure is $$56\sqrt{3}$$, what is the perimeter of the figure?
Point B is to the direct north of Point A, while Point C is to the direct east of Point A. The distance between Point B and Point A is 14,and the distance between Point B and Point C is 4 more than the distance between Point A and Point C. What is the distance between Point B and Point C? Give your answer as a
fraction
.
Δ ABC is an equilateral triangle,DE is parallel with AB. The area of Δ CDE is 1/9 of the area of Δ ABC. What is the ratio of CD to AD? Give your answer as a
fraction
.
What is the ratio of the area of a square region with diagonal 10 to the area of a square region with diagonal 20? Give your answer as a
fraction
.
In the figure, the square ENFM is inscribed in the rectangle ABCD, E and F are the midpoints of side AB and DC. If the area of ENFM is 64, G and H are the midpoints of AD and BC, and GM=NH=5, then what is the area of ABCD?
The figure above shows five congruent circles each with radius 2 such that each of the five circles is tangent to two other congruent circles and to a smaller inner circle. The perimeter of the figure is composed of 5 line segments of length x and 5 circular arcs of length y. What is the perimeter of the figure?
The radius of cylinder A is twice as many as the radius of cylinder B, and the height of cylinder A is twice as many as the height of cylinder B, so what is the ratio of the volume of cylinder B to the volume of cylinder A? Give your answer as a
fraction
.
Vertical cylinder A and B share the same volume. The base radius of cylinder A is twice as many as that of cylinder B. What is the height ratio of cylinder A and B? Give your answer as a
fraction
.
Three students need to read 50 proposals. Each proposal has to be read by at least one student. Student A read 38 of them, Student B read 36 of them, while Student C read 28 of them. At least how many proposals are read by at least two students?
A man updates his two computers regularly. On June, $$1^{st}$$, he updated both of them, then update the first computer every six days (for example, the next update will be June, $$7^{th}$$), and update the second one every 8 days, so in the 30 days of month June, how many days will this man not update the computers?
In a sequence, $$S_{1} = 5$$, $$S_{n} = 2* S_{n-1}$$, for any positive integer n greater than 1.
Quantity A
$$S_{8}$$
Quantity B
$$\frac{S_{21}}{S_{13}}$$
S is a list with 50 numbers. If $$a_{n}= \frac{n+1}{n}-1$$ , where n is an odd number,and $$a_{n} = - a_{n-1}$$, where n is an even number, what is the range of the 50 numbers?
In a sequence,$$a_{1}=1$$, $$a_{n}=a_{n-1}+n$$,what is the value of $$a_{49}$$?
How many different three-digit positive integers are there that are greater than 300 and contain three of the four digits 1, 2, 3, and 4?
Each digit of a four-digit integer is odd, how many such four-digit integers are there?
Rhonda has 4 different jackets, 3 different skirts, 2 different blouses,and 4 different scarfs that can be worn as part of an outfit. If an outfit consists of a jacket, a skirt, and a blouse with or without a scarf,how many different outfits can Rhonda wear?
In an election, 2 candidate, 3 candidates and 4 candidates campaign for A position, B position and C position, respectively. If every voter must choose one candidate for each position, how many different ways can a voter fill the voting ballot?
A 3-digit integer is formed by 3 different integers selected from 1,2,3,4,5. How many different such 3-digit integer?
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