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Which quadrant does line y=2x+4 intersect parabola y=-$$x^{2}$$+3?
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There are 11 numbers in the sequence. What is the median of this series?
1: When the 11 numbers are arranged in order from small to large, the first five numbers are less than 5.
2: When the 11 numbers are arranged in the order of small to large, and the last five numbers are all greater than 5.
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The size of the rectangular picture frame is shown in the figure. The length of the outer border is 1.5 times of the width. The distance between the inner and outer borders is 2. The area of the border area is 196. What is the length of the frame's outer border?
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The distance one student walked in t seconds is 2/k. How far can the student walk y min at the same speed?
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Which of the following is closest to 9*$$10^{10}$$ - 2*$$2^{5}$$?
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There are four areas, A, B, C, and D, on a color plate. A student has four colors of paint. The student wants to choose a different color scheme for each adjacent area. How many kinds of painting schemes meet the requirement?
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All the angles in the figure below are right angles. What is the circumference of the figure?
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There are three points a, b, and c on the number axis. The distance between a to c is four times as far as that of b to c. The coordinate of a is -7/8. The coordinate of b is - 5/24. What is the coordinate of c?
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Is xy > 0?
1:x-y=1
2:lyl > 2
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A driver usually takes 4.5 hours to drive 270 km. If his speed is 10 km/h slower than usual due to rain, how long does it take to drive the same distance?
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The length of the three sides of a triangle is 6, x, 2x. What is the range of x?
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$$2^{x}$$=$$4^{a}$$.What is the relationship between a and x?
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There are 13 numbers in a sequence. What is the median of this series?
1: The average of this series is 74.
2: If the largest number and the smallest number are deleted, the median of the new sequence is 72.
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A cyclist rides twice around a track whose circumference is 50 km. The average speed of the first lap was 40 km/h, and the average speed of the second lap was 20 km/h. What's the average speed of his ride?
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Someone rode 30 km. What's his average speed?
1: The average speed of his first 20 km was 20 km/h.
2: The average speed of his last 20 km was 10 km/h.
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nm≠0, Is $$n^{2}$$ - n=$$m^{2}$$ - m?
1:n+m=1
2:n=m
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AC=OB. What is the relationship between x and y?
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The teacher gave 45 candies to the students in one class, and each of them received the same number of candies. The remaining sugar was 3 less than the number of students. Which one of the options can`t be the number of students in this class?
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Is x < 0?
1:$$x^{3}$$ < $$x^{4}$$
2:$$x^{3}$$ < $$x^{2}$$
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Is $$x^{2}$$+9x+y even?
1:x=10
2:y=15
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