【SAT官方每日一题】8/1/12 Mathematics > Standard Multiple Choice

滚吧肥汤圆UID：3272378

Read the following SAT test question and then click on a button to select your answer.
, b6 D; z2 b+ n9 e: l4 \0 [4 H
. k3 ^8 [3 \8 |1 A! y/ r0 A  T+ QIf , what is the value of, ?


0 ^) U0 f8 y% x1 t$ ?3 f- q* v9 D

0 b8 z6 B4 n' G# Z+ r, [' E3 V
A.  40

" C+ u3 A7 n1 ]  k* C9 \1 qB.  18

! b7 A' S; s- {0 D7 f  q2 J" ^C.  9
/ f/ [# n9 n* A8 G$ @) |0 w: n
D.  4

+ W( k8 T( C/ C" ?$ L# yE. It cannot be determined from the information given.

正确答案:A

解析:
% W) N( }3 @4 b, t4 v, }
Since, , it follows that , and so . Therefore, .

" i, L' K' S4 g) M# }0 p  V
1 M" {" k3 q1 e% s, n& Z9 d