GWD6 Math 6,7,8三道题答案有问题,麻烦大家看看.

beibeizhu · 发表于 2005-9-9 10:30:00

这三题很简单,答案给出的是C,D,D,我做的是D,C,C.麻烦路过的各位看一看，确认一下.谢谢

Q6:

The ratio of the number of red cars in a certain parking lot to the number of black cars is 3 to 8. If there are 72 black cars in the lot, how many red cars are there in the lot?

A. 11

B. 15

C. 24

D. 27

E. 32

Q7:

What is the value of │x + 7│?

(1) │x + 3│= 14

(2) (x + 2)² = 169

A. Statement (1) ALONE is sufficient, but statement (2) alone 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. Statements (1) and (2) TOGETHER are NOT sufficient.

Q8

The figure above represents a square garden that is divided into 9 rectangular regions with indicated dimensions in meters. The shaded regions are planted with peas, and the unshaded regions are planted with tomatoes. If the sum of the areas of the regions planted with peas is equal to the sum of the areas of the regions planted with tomatoes, what is the value of x?

A. 0.5

B. 1

C. 1.5

D. 2

E. 2.5