6 Is x/3 + 3/x ≥ 2?

(1) x ≥ 3

(2) x ≥ 1

7 Which quadrant does point p(m, n) locate?

(1) M – 1 > 0

(2) N – 1 < 0

8 If points (a,b) and (c,d) are on line k, is the slope of line k positive?

(1) a < c, and b < d.

(2) The product of x--‐intercept and y--‐intercept is negative

9 a and b are positive integers. If 5a – 7(b + 3) = 2, what is the least value of a – b?

A. 5

B. 10

C. 15

D. 20

E. 23

10 Jake, a twelve‐year-‐old boy, went to theater with his parents last weekend. The theater gives 30% discount for kid older than five and younger than twelve. If they spent totally 42 dollars for a movie, how much they spent for Jake?

A. 11

B. 12

C. 10

D. 13

E. 14

答案：

6. A

7. E

8. D

9. A

10. E