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If $${4x}<{x}<{x^3}<{x^2}$$, which of the following is a possible value of x ?
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$$(-{3})^{-2}=$$
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At a certain carpet factory, if carpeting is moving continuously through a dryer at a constant rate of 21,600 square feet per hour, how many seconds does it take for an area of 1 square foot of carpeting to move through the dryer?
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OG19-数学分册
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If the average (arithmetic mean) of 5 numbers j, j + 5, 2j- l, 4j- 2, and 5j- 1 is 8, what is the value of j?
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191020
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$$2^n = 2^x + 2^x + 2^x + 2^x $$, what's the value of x in terms of n?
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OG12
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Leo can buy a certain computer for $${P}_{1}$$ dollars in State A, where the sales tax is $${t}_{1}$$ percent, or he can buy the same computer for $${p}_{2}$$ dollars in State B, where the sales tax is $${t}_{2}$$ percent. Is the total cost of the computer greater in State A than in State B ?(1)$${t}_{1} >{t}_{2}$$(2)$${p}_{1}{t}_{1} >{p}_{2}{t}_{2}$$
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PREP07 Test 2
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The mass of 1 cubic meter of a substance is 800 kilograms under certain conditions. What is the volume, in cubic centimeters, of 1 gram of this substance under these conditions? (1 kilogram = 1,000 grams and 1 cubic meter = 1,000,000 cubic centimeters)
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 A tank with an isosceles-triangular cross section with sides 4,4,and 6 meters, has a length of 10 meters, and is currently resting on the 6 meter by 10 meter face. The tank is filled with water to the depth of 1 meter. If the tank is placed on a triangular face, what would be the depth of the water in the tank?
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PREP07 Test 2
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Is $$\frac{1}{p}>{r\over(r^2+2)}$$?(1) p = r(2) r > 0
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OG18-数学分册
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If x and y are integers such that $$2 < x \le 8$$ and $$2 < y \le 9$$, what is the maximum value of $$\frac{1}{x} - \frac{x}{y}$$?
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OG21 OG2022
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If k and n are positive integers such that n > k, the n k! + （n - k） • （k - 1）! is equivale nt to which of the following?
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Manhattan
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Which of the following has a value greater than 1?
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PREP07 Test 2
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If m and n are positive integers and mn = k, is m + n = k + 1 ? (1) m = 1 (2) k is a prime number.
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If $${x}≠{0}$$, then $$({x}+\frac1 x)^{2}-({x}-\frac1 x)^{2}=$$
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300难题
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What is the value of $$\frac{x}{yz}$$?
1. x=$$\frac{y}{2}$$ and z=$$\frac{2x}{5}$$
2. $$\frac{x}{z}$$ =$$\frac{5}{2}$$ and $$\frac{1}{y}$$ = $$\frac{1}{10}$$
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190321
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(k-1)x=5.Is x>1.25?'
1:k is a positive integer.
2:k>5
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191222 730高分节-数学测试
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$$x_1$$, $$x_2$$, …, $$x_n$$，$$x_1$$=3，$$x_n=2 x_{n-1}-1$$，问$$x_{20}-x_{19} = $$
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OG20 OG2022
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If a and b are integers, and b > 0, does $$\frac{a-1}{b+1}=\frac{a}{b}$$
1.$$a = b – 4$$
2.$$a = –b$$
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OG12 OG15 OG16 OG17
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An operation ◎ is defined by the equation a◎b=(a-b)/(a+b), for all numbers a and b such that a ≠ -b. If a ≠ -c and a ◎ c = 0, then c =
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Magoosh
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If AD = 3x, AE = 5x, EB = y and DC = 5y, what is the ratio of the area of triangle DEC to the area of rectangle ABCD ?Note: Figure not drawn to scale
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