Re: [計量] 幾題計請教 疑似答案有誤
※ 引述《chime0515 (我愛劉德華)》之銘言：
: 1. The toll for a certain bridge is $0.15 or 1 token. Tokes are sold in pack
: of 40 for $4.00
: A) The ercent saved on 40 trips across the bride if a token, rather than $0.15
: , is used to pay each toll.
: B) (66+2/3)%
: 答案A)
: 自己算是 A=33% < B
就當答案錯吧
: 2. T is no more than 20 percent greater than the integer x, and T is no
: smaller than a number 20 percent less than the integer x. If T = 60,
: which of the following indicates the smallest possible interval for x?
: Ans: 50 <= x <= 75
0.8x <= T =60
60= T <= 1.2x
x<=75
x>=50
: 3. A line in the xy-coordinate plane has x-intercept a and y-intercept b,
: where a and b are nonzero. The slope of this line is?
: Ans: -b/a
: not a/b????
m(x-a)=(y-0)
m(x-0)=(y-b)
y=mx-ma=mx+b
m=-b/a
: 感謝幫忙
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10/19 23:08, , 1F
10/19 23:08, 1F
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