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What is the value of $$x$$ ?(1)$${x}^{2}+{y}^{2}$$ = 25(2)$$xy = 12$$
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OG12 OG15 OG16 OG17
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A clothing store acquired an item at a cost of x dollars and sold the item for y dollars. The store's gross profit from the item was what percent of its cost for the item?(1)$$y - x = 20$$(2)$$\frac y x=\frac5 4$$
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OG12 OG16 OG17 OG15
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In the xy-plane,region R consists of all the points (x, y) such that 2x + 3y ≤ 6. Is the point (r, s)in region R ?(1)3r +2s =6(2)r ≤ 3 and s ≤ 2
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If sequence S has250 terms, what is the 243rd term of S ?(1)The 242nd term of S is-494.(2)The first term of S is-12, and each term of S after the first term is 2 less than the preceding term.
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OG16 OG17 OG18 OG19 OG20 OG2022
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A certain list consists of 3 different numbers. Does the median of the 3 numbers equal the average (arithmetic mean) of the 3 numbers?(1)The range of the 3 numbers is equal to twice the difference between the greatest number and the median.(2)The sum of the 3 numbers is equal to 3 times one of the numbers.
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OG15 OG16 OG17 OG18
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The weights of all dishes of type X are exactly the same, and the weights of all dishes of type Y are exactly the same. Is the weight of 1 dish of type X less than the weight of 1 dish of type Y ?(1)The total weight of 3 dishes of type X and 2 dishes of type Y is less than the total weight of 2 dishes of type X and 4 dishes of type Y.(2)The total weight of 4 dishes of type X and 3 dishes of type Y is less than the total weight of 3 dishes of type X and 4 dishes of type Y.
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If x, y,and z are positive integers, is xz even?(1)xy is even.(2)yz is even.
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If w and c are integers, is w > 0?(1)w + c > 50(2)c>48
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Is$$xy\gt\frac{x}{y}$$ ?
(1)xy > 0
(2)y < 0
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OG18-数学分册
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The total cost of an office dinner was shared equally by k of the n employees who attended the dinner. What was the total cost of the dinner?(1)Each of the k employees who shared the cost of the dinner paid $19.(2)If the total cost of the dinner had been shared equally by k + 1 of the n employees who attended the dinner, each of the k + 1 employees would have paid $18.
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OG17
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From Leland's gross pay of p dollars last week, t percent was deducted for taxes and then s dollars was deducted for savings. What amount of Leland's gross pay last week remained after these two deductions?(1)p - s = 244(2)pt = 7,552
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OG16 OG17 OG18 OG19 OG20 OG2022
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If $${x}{y}≠{0}$$ and $${x}^{2}{y}^{2}-{x}{y}={6}$$, which of the following could be y in terms of x?I.$$\frac1 {2x}$$II.$$-\frac2 x$$III $$\frac3 x$$
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A certain computer program generates a sequence of numbers $${a}_{1}$$, $${a}_{2}$$, ... , $${a}_{n}$$ such that $${a}_{1}={a}_{2}={1}$$ and $${a}_{k}={a}_{k-1}+{2a}_{k-2}$$ for all integers k such that $$3 \le k\le n$$. If $$n > 6$$, then $${a}_{7}=$$ ?
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If $$5x = 2y$$ and $${x}{y}≠{0}$$, then x is what percent of y?
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排列组合
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If a certain coin is flipped, the probability that the coin will land heads is $$\frac1 2$$. If the coin is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and not on the last 2 flips?
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OG16 OG17 OG18 OG19 OG20 OG2022
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The function f is defined by $${f}({x})=\sqrt x-{10}$$ for all positive numbers x. If $$u = f(t)$$ for some positive numbers $$t$$ and $$u$$. What is t in terms of $$u$$?
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OG16 OG17 OG18 OG19 OG20 OG2022
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 The graph of which of the following equations is a straight line that is parallel to line l in the figure above?
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OG15 OG16 OG17 OG18 OG19 OG20 OG2022
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Company P had 15 percent more employees in December than it had in January. If Company P had 460 employees in December, how many employees did it have in January?
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Each of the 30 boxes in a certain shipment weighs either 10 pounds or 20 pounds, and the average (arithmetic mean) weight of the boxes in the shipment is 18 pounds. If the average weight of the boxes in the shipment is to be reduced to 14 pounds by removing some of the 20-pound boxes, how many 20-pound boxes must be removed?
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If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words?
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