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9/17 Q50 分手
1. DS: y = a(x-h)^2 + k, how many x-intercepts? a ≠ 0 Ans: B
2. PS: 1/ [√(2) -1] = ? Ans: √(2) + 1
3. PS: x^2 + mx + n = 0, two roots = 1 & 2. m - n = ? Ans: -5
4. DS: 7 days sold 10 refrigerators, what is the median? Ans: A
- sold at least 1 every day
- sold at most 2 a day
5. DS: Two sqaures both 10x10. Is the shaded area 25? Ans: E
- P is on the diagonal line of ABCD
- CD and PQ is perpendicular
6. Equal chances to go down from A. What is the probability of L? Ans: 1/4
Also on the exam:
JJ Q5 Ans: D
JJ Q21 Ans: Five
JJ Q30 DS: 3 sports: swimming, tennis, aerobics. Given ratio of each. What is the # of people doing all 3 sports?
- Given # of people doing exact 2 sports
- Given # of people doing swimming + tennis
JJ Q33 PS: 3cups of water – 1/6 , 1/8 , 1/9. Total of water is between? Ans: 1/3 and 1/2
JJ Q35 Ans: 4
JJ Q40 a1=1 Ans: 4
JJ Q55 Chi-square test
JJ Q58 Ans: 18
updated 9/19
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