gwd24-8,11,19,36

fhillis

8 我觉得我一直没有把这道题理解正确，麻烦大家给我解释一下！！！

Can a certain rectangular sheet of glass be positioned on a rectangular tabletop so that it covers the entire tabletop and its edges are parallel to the edges of the tabletop?

(1)   The tabletop is 36 inches wide by 60 inches long.

(2)   The area of one side of the sheet of glass is 2400 square inches.

 

l        Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient

l        Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient

l        BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

l        EACH statement ALONE is sufficient

l        Statements (1) and (2) TOGETHER are NOT sufficient

Answer E

11.这道题就是没有把 9 3^1/2 到底表达的是什么意思

An equilateral triangle that has an area of 9 3^1/2 is inscribed in a circle. What is the area of the circle?

A . 6pi   B. 9pi  C. 12 pi  D. 9pi 3^1/2   E. 18pi 3^1/2

Answer C

19这道题是讲的是什么意思呀

Color X ink is created by blending red, blue, green, and yellow inks in the ratio 6:5:2:2. what is the number of liters of green ink that was used to create a certain batch of color X ink?

(1)   The amount of red ink used to create the batch is 2 liters more than the amount of blue ink used to create the batch.

(2)   The batch consists of 30 liters of color X ink.

 

l        Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient

l        Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient

l        BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

l        EACH statement ALONE is sufficient

l        Statements (1) and (2) TOGETHER are NOT sufficient

Answer E

36 我不知道这类题如何用表达式列出来呀

Mary passed a certain gas station on a highway while traveling west at a constant speed of 50 miles per hour. Then, 15 minutes later, Paul passed the same gas station while traveling west at a constant speed of 60 miles per hour. If both drivers maintained their speeds and both remained on the highway for at least 2 hours, how long after he passed the gas station did Paul catch up with Mary?

A.     30 min

B.     45 min 

C.     1 hr

D.     1 hr 15 min

E.      1 hr 30 min

answer  D

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THANKS

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