1 PREP书上的
What’s the value of 3x2+6x-4 ? (1) x(x+2)=0 (2) -1<x<4 我认为是A，但是给出的解释和答案是C 2 GWD上的 If n is an integer and 100 < n <200, what is the value of n? (1) n/36 is an odd integer. (2) n/45 is an even integer. 我认为是B，但是答案是C 3 GWD上的 At a certain company, each employee has a salary grade s that is at least 1 and at most 5. Each employee receives an hourly wage p, in dollars, determined by the formula p = 9.50 + 0.25(s – 1). An employee with a salary grade of 5 receives how many more dollars per hour than an employee with a salary grade of 1? A. $0.50 B. $1.00 C. $1.25 D. $1.50 E. $1.75 我认为是B，答案是C 4 GWD上的 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 我选了D，答案是C，怎么算也算不到
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