1、五道SAT數學題求詳細解答

In the integer 3589 the digits are all different and increase from left to right. How many integers between 4000 and 5000 have digits that are all different and that increase from left to right?

這是一道填空題，不理解題目意思，求地道翻譯+解答

If the letters L, O, G, I, and C are randomly arranged to from a five-letter "word", what is the probability that the result will be the word LOGIC?

A 1/120 B 1/24 C 1/5 D 1/4 E 1/2

求用Cmn或Pmn的排列組合公式做，要步驟及講解

Three fair coins are tossed at the same time. What is the probability that all three coins will come up heads?

A 1/8 B 1/6 C 1/4 D 1/3 E 3/8

求用Cmn或Pmn的排列組合公式做，要步驟及講解

If I 6-5y I ＞20, which of the following is a possible value of y?

A -6 B -1 C 1 D 3 E -2

求完整步驟

If g(x)＞0 for all real values of x, which of the following could be the function g?

A g(x)=x + 1 B g(x)=x - 1 C g(x)=x^2 + 1 D g(x)=x^2 - 1 E g(x)x^3 + 1

求完整步驟

2、鄙人做SAT題中語法部分出現一些問題，求英語牛人相助啊！！！

s home, for a visit, never imaging that five years would pass (before) seeing Derek again.(08050629)

應改為he saw。但是不明白原句為什么不對，before即可為adv,又可為prep,還可為conj.，為什么這里要用conj而不是prep呢？

2、Determined to make a name for herself as a writer of short stories, Helen never submits anything to an editor until （revising） it several times.（09050625）

應改為Helen has revised。問題和1、類似，until 可為conj和prep，怎么區別呢？？？

3、(Opposite to) most people I know, Annie, a good photographer herself, actually enjoys seeing the photographs that her friends take on their vacations.（06050626）

應改為Opposite with,但是兩者有何區別呢？

4、Chess players find that playing against a computer is helpful (to improve) their skills, even though no chess-playing computer has yet won a championship.（OC010720）

應改為of improving。 還是不知道區別。

5、Annual visitors to New York City's Central Park number almost ten times (that of) Mount Rushmore.(07100526)

應改為those to。這道題題意不是很明白，幫忙分析下。麻煩了。

懸賞不是很高，但我也是心有余而力不足啊，希望高人捧場！！！", 'contentText': "括號中的部分為原句中的錯誤部分！

1、Quincy took Dan to Derek's home, for a visit, never imaging that five years would pass (before) seeing Derek again.(08050629)

應改為he saw。但是不明白原句為什么不對，before即可為adv,又可為prep,還可為conj.，為什么這里要用conj而不是prep呢？

2、Determined to make a name for herself as a writer of short stories, Helen never submits anything to an editor until （revising） it several times.（09050625）

應改為Helen has revised。問題和1、類似，until 可為conj和prep，怎么區別呢？？？

3、(Opposite to) most people I know, Annie, a good photographer herself, actually enjoys seeing the photographs that her friends take on their vacations.（06050626）

應改為Opposite with,但是兩者有何區別呢？

4、Chess players find that playing against a computer is helpful (to improve) their skills, even though no chess-playing computer has yet won a championship.（OC010720）

應改為of improving。 還是不知道區別。

5、Annual visitors to New York City's Central Park number almost ten times (that of) Mount Rushmore.(07100526)

應改為those to。這道題題意不是很明白，幫忙分析下。麻煩了。

懸賞不是很高，但我也是心有余而力不足啊，希望高人捧場！！！", 'supplyRich': '

3、SAT數學題求解答

What is the smallest possible common multiple of two integers which are both greater than 50?

A 204 B 100 C 51 D 155 E 102 書上答案是C 為什么

還有怎樣開立方根 比如說1350 和 600 怎樣開立方根

4、SAT 數學題 幫忙解答下

if 3 more than x is 2 less than 9 , what is the value of x ？

if 4 bags of flour with an average (arithmetic mean)weight of 15pounds are put onto a shelf with 45-pound bags of flour , what is the average weight , in pounds of all 8 bags on the shelf ?

a certain ice-cream parlor offers 6 different toppings for sundaes . how many combinations of 2 different toppings from those offered are possible ?

if one of the positive factors of 40 is to be chosen at random , what is the probability that the chosen factor will not be a multiple of 10 ?

the length of each side of an equilateral triangle will be tripled to create a second triangle . the area of the second triangle will be how many times the area of the original triangle ?

when the positive ingeter x is divided by 5 , the remainder is 3 , what is the remainder when x+19 is divided by 5 ?

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