推 domeself:謝謝你的解答 很清楚喲 感謝感謝!!! 12/22 00:37
※ 引述《domeself (be strong)》之銘言：
: Q10
: A certain quantity is measured on two different scales,
: the R-scale and the S-scale, that are realated linearly.
: Measurements on the R-scale of 6 and 24 correspond to
: measurements on the S-scale of 30 and 60, respectively.
: What measurement on the R-scale corresponds to a
: measurement of 100 on the S-scale?
: A.20
: B.36
: C.48
: D.60
: E.84
: ANS:C
這一題就像溫度換算一樣
24R-6R αR-6R
------- = ---------- 整理
60S-30S 100S-30S
18 α-6
----=--------整理
30 100-30
α-6= 42
-->α=48 選C
: Q24
: From Leland's gross pay of p dallars last week, t percent
: was deducted for taxes and then s dollars was deducted
: for savings. What amount of Leland's gross pay last week
: remained after these two deductions?
: (1)p-s=244
: (2)pt=7,552
: ANS:C
Gross Pay= p(1-t%)-s
-->p-s-pt%
即可得解
: 麻煩各位大大 算了很久算不出來 感謝 :)
這兩題的KEY: 一個是要看出題目想要問的東西，另一個是把題目給的條件式子化
其實我覺得AT數學幾乎可以用這兩招解。
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※ 編輯: alansher 來自: 125.225.83.50 (12/22 00:28)