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题目： $$If{{8-x}\over{x+1}} = x, then x^{2} + 2x - 3 =$$

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题目： If f(x) = $$12-{x^{2}\over{2}}$$and f(2k) = 2k, what is one possible value for k?

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题目： In the coordinate system above, which of the following could be the equation of line p?

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题目： $$If 2^{2n} + 2^{2n} + 2^{2n} + 2^{2n} = 4^{24}$$, then n =

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题目： If the average (arithmetic mean) of seven consecutive integers is k + 2, then the product of the greatest and least integer is

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题目： On a certain multiple-choice test, 9 points are awarded for each correct answer, and 7 points are deducted for each incorrect or unanswered question. Sally received a total score of 0 points on the test. If the test has fewer than 30 questions, how many questions are on the test?

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题目： $$5\sqrt{2}$$ percent of $${{1}\over\sqrt{200}}$$=

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题目： If∠CFD=85° , then what is the value of x?Note: Figure not drawn to scale

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题目： If the average (arithmetic mean) of x, y and 15 is 9, and the average of x, 2y and 2 is 7, then y =

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题目： If $$9^{2x+5} = 27^{3x-10}$$, then x =

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题目： For all integers n, the function f is defined by $${f}({n})={a}^{n}$$, where a is a constant. What is the value of $$f (1)$$?(1)$$f (2) = 100$$(2)$$f (3) = -1,000$$

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题目： Set Q consists of the following five numbers: Q = {5, 8, 13, 21, 34}. Which of the following sets has the same standard deviation as Set Q?I. {35, 38, 43, 51, 64}II. {10, 16, 26, 42, 68}III. {46, 59, 67, 72, 75}

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题目： In a certain game, you perform three tasks. You flip a quarter, and success would be heads. You roll a single die, and success would be a six. You pick a card from a full playing-card deck, and success would be picking a spades card. If exactly one of these three tasks is successful, then you win the game. What is the probability of winning the game?

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题目： If x and y are positive odd integers, then which of the following must also be an odd integer?I. $$x^{y+1}$$II. x(y+1)III. $$(y+1)^{x-1} + 1$$

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题目： $$10^{x} + 10^{y} + 10^{z} = n$$, where x, y, and z are positive integers. Which of the following could be the total number of zeroes, to the left of the decimal point, contained in n? I. x + yII. y – zIII. z