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306 PS: 2/(x+2)+3/(x+3)>1,what is the possible value of x^2?
I.1
II.4
III.9
A.I only
B.II only
C.I&II only
D.I&III only
E.I, II, & III
选项可能没那么准确,但是题目应该是没错的。我选的是C。
开方之后代入挨个试试。
307 PS: In a research, 15% of the plants developed fungus and died, 40% of the plants who developed fungus but not died, what is the percentage of the plants developed fungus?
A. 25%
B. 27%
C. 35%
D. 40%
E. 55%
这道题目我很确定题目是这么写的,具体的语言可能不一样,但是题目和选项的数字一定是这样,我数学很渣,尤其是这种题目,ZenZen无能,这道题算了好久,答案我就不说了,怕误导大家,大家做了跟我说说算了==
应该是简单的加减55%
308 DS: What is the area of the isosceles triangle PQR?
1). the perimeter of PQR is 55.
2). one of its three sides is 15.
我选的好像是E。
重题。 |
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