谁能帮我解答下面两GMAT题AcertainbusinessproducedxrakeseachmonthformNovemberthroughFebruaryandshippedx/2rakesatthebeginningofeachmonthfromMarchthroughOctober.ThebusinesspaidnostoragecostsfortherakesfromNov

Question

谁能帮我解答下面两GMAT 题
A certain business produced x rakes each month form November through February and shipped x/2 rakes at the beginning of each month from March through October.The business paid no storage costs for the rakes from November through February,but it paid storage costs of $0.10 per rake each month from March through October for the rakes that had not been shipped.In terms of x,what was the total storage cost,in dollars,that the business paid for the rakes for the 12 months form November through October?
Q7:
What is the value of │x + 7│?
(1)\x05 │x + 3│= 14
(2)\x05 (x + 2)2 = 169
\x05
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.
（为什么答案选 C 是不是 这种题都必须要有唯一解 才行,是不是有两个或者多个 答案的就不行））

Answer 1

是的.只有唯一解才算是SUFFICIENT.GMAT加油!