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OG18-语文分册
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According to the passage, conventional spiral galaxies differ from low-surface-brightness galaxies in which of the following ways
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OG18-数学分册
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Three people each contributed x dollars toward the purchase of a car. They then bought the car for y dollars, an amount less than the total number of dollars contributed. If the excess amount is to be refunded to the three people in equal amounts, each person should receive a refund of how many dollars?
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OG18-数学分册
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How many integers x satisfy both 2 < x ≤ 4 and 0 ≤ x ≤ 3 ?
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OG18-数学分册
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A total of 5 liters of gasoline is to be poured into two empty containers with capacities of 2 liters and 6 liters, respectively, such that both containers will be filled to the same percent of their respective capacities. What amount of gasoline, in liters, must be poured into the 6-liter container?
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OG18-数学分册
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A certain drive-in movie theater has a total of 17 rows of parking spaces. There are 20 parking spaces in the first row and 21 parking spaces in the second row. In each subsequent row there are 2 more parking spaces than in the previous row. What is the total number of parking spaces in the movie theater?
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OG18-数学分册
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$$\frac{3}{100} + \frac{5}{1,000} + \frac{7}{100,000}$$
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OG18-数学分册
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 In the rectangular coordinate system shown above, points O, P, and Q represent the sites of three proposed housing developments. If a fire station can be built at any point in the coordinate system, at which point would it be equidistant from all three developments?
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OG18-数学分册
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The annual budget of a certain college is to be shown on a circle graph. If the size of each sector of the graph is to be proportional to the amount of the budget it represents, how many degrees of the circle should be used to represent an item that is 15 percent of the budget?
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OG18-数学分册
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Ada and Paul received their scores on three tests. On the first test, Ada's score was 10 points higher than Paul's score. On the second test, Ada's score was 4 points higher than Paul's score. If Paul's average (arithmetic mean) score on the three tests was 3 points higher than Ada's average score on the three tests, then Paul's score on the third test was how many points higher than Ada's score?
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OG18-数学分册
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Guadalupe owns 2 rectangular tracts of land. One is 300 m by 500 m and the other is 250 m by 630 m. The combined area of these 2 tracts is how many square meters?
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OG18-数学分册
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The product of 3,305 and the 1-digit integer x is a 5-digit integer. The units (ones) digit of the product is 5 and the hundreds digit is y. If A is the set of all possible values of x and B is the set of all possible values of y, then which of the following gives the members of A and B ?
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OG18-数学分册
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$$\frac{31}{125}$$
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OG18-数学分册
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If x = $$-\frac{5}{8}$$ and y =$$ -\frac{1}{2}$$, what is the value of the expression $$-2x -y^{2}$$
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OG18-数学分册
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If a square region has area n, what is the length of the diagonal of the square in terms of n ?
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OG18-数学分册
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Which of the following must be equal to zero for all real numbers x ?I. $$-\frac{1}{x}$$II. x + (- x)III. $$x^{0}$$
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OG18-数学分册
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The number of rooms at Hotel G is 10 less than twice the number of rooms at Hotel H. If the total number of rooms at Hotel G and Hotel H is 425, what is the number of rooms at Hotel G ?
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OG18-数学分册
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The maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation R = 176 ‒ 0.8x. What is the age, in years, of a person whose maximum recommended pulse rate when exercising is 140 ?
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OG18-数学分册
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For what value of x between –4 and 4, inclusive, is the value of $$ x^{2} – 10x + 16 $$ the greatest?
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OG18-数学分册
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If x + y = 2 and $$x^{2} + y^{2} = 2$$, what is the value of xy ?
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OG18-数学分册
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What is the ratio of $$\frac{3}{4}$$ to the product $$4(\frac{3}{4})$$
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