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OG19-数学分册
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If $$ x - y = R$$ and $$ xy = S$$ , then $$ (x - 2)(y + 2)$$ =
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Magoosh
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If the average (arithmetic mean) of five consecutive negative integers is 2k – 1, what is the difference between the greatest and least of the five integers?
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Magoosh
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A is the center of the circle, and the length of AB is$$4\sqrt{2}$$ . The blue shaded region is a square. What is the area of the shaded region?
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190113
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The linear equation is 4x + 3y-10 = 0. What's the slope of this line?
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PREP07 Test 2
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Machine A produces pencils at a constant rate of 9,000 pencils per hour, and machine B produces pencils at a constant rate of 7,000 pencils per hour. If the two machines together must produce 100,000 pencils and if each machine can operate for at most 8 hours, what is the least amount of time, in hours, that machine B must operate?
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Ready4
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The figure below shows a square inscribed in a circle with a radius of  . What is the area of the shaded region?
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On January 1, 1994, Jill invested P dollars in an account that pays interest at a rate of 8 percent per year, compounded annually on December 31. If there were no other deposits or withdrawals in the account, how many dollars were in the account on January 1, 1998, in terms of P?
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Ready4
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If  and  , what is the value of  ?
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Magoosh
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If $$4^{n} + 4^{n} + 4^{n} + 4^{n} = 4^{16}$$ , then n =
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For any integer k greater than 1, the symbol $${k}^\ast$$ denotes the product of all the fractions of the form $$\frac1 t$$, where t is an integer between 1 and k, inclusive. What is the value of $$\frac{{5}^\ast} {{4}^\ast}$$?
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OG15 OG16 OG17 OG18 OG19 OG20 OG2022
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$${\frac{0.99999999}{1.0001}}-{\frac{0.99999991}{1.0003}}=$$
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Magoosh
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The average (arithmetic mean) of four numbers is 4a + 16. When a fifth number is added, the average becomes 5a + 20. The fifth number is
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190321
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There are 12 candies with four colors in an opaque bag. The proportion of red candy, yellow candy, white candy and green candy is 1/3,1/2,1/12,1/12, respectively. If two candies are taken out, what's the probability of picking at least one white candy out of this bag?
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191020
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How much longer is route HSW than route HTW?
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Magoosh
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$${{1}\over{x*\sqrt{3}}}={\sqrt{2}\over{24}}$$In the equation above, x =
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181215
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AB is perpendicular to AC. What is the x-interception of line AC?
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Magoosh
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$${8*10^{40}}\over1*10^{10}$$=
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OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022
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Which of the following is equivalent to the pair of inequalities x + 6>10 and $$x-3\le5$$
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$$1+{{1}\over{1}+({{1}\over{1}+\frac{1}{3}})}$$
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OG17 OG18 OG19 OG20 OG2022
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When traveling at a constant speed of 32 miles per hour, a certain motorboat consumes 24 gallons of fuel per hour. What is the fuel consumption of this boat at this speed measured in miles traveled per gallon of fuel?
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