GWD 22-29.34

conquergmat

In the xy-plane, region R consists of all the prints (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

A. statement (1) alone is sufficient, but statement(2) alones is not sufficient

B. statement(2) alone is sufficient, but statement (1) alone is not sufficient

C. both statements together are sufficient, but neither statement alone is sufficient

D. each statement alone is sufficient

E. statement (1) and (2) together are not sufficient

The correct answer is E

Why?

34. One gram of certain health food contains 7 percent of the minimum daily requirement of vitamin E and 3 percent of the minimum daily requirement of vitamin A. If vitamin E and vitamin A are obtained from no other source, approximately how many grams of the health food must be eaten daily to provide at least the minimum daily requirement of both vitamins?

A. 3

B. 7

C.10

D.14

E.33

The correct answer is E

Why?

脑子糊涂了，不知道怎么做了，请NN指点

conquergmat

是别人给我的,没有电子版本,不好意思.