2.)Last year,the salaries of Cindy and Katy were the same.This year,Katy's salary is increased by 8% while Cindy's salary is increased by 8%.
(a.)Suppose the difference between their present salaries is $1100.Find their salaries last year.
maths questions??(4)
2006-12-03 9:33 pm
回答 (4)
2006-12-03 9:40 pm
✔ 最佳答案
出錯問題喇 both increased 既..如果cindy 係decreased 8%既話
let their salaries last year be $y
y*(1+8%)-y*(1-8%)=1100
1.08y-0.92y=1100
0.16y=1100
y=6875
so,their salaries last year is $6875
2006-12-16 11:42 pm
設 their salaries last year is y.
Cindy's salary this year is 108%y.
Katy's salary this year is 92%y.
108%y-92%y=$1100
16%y=$1100
y=$1100/16%
y=$6875
Cindy's salary this year is 108%y.
Katy's salary this year is 92%y.
108%y-92%y=$1100
16%y=$1100
y=$1100/16%
y=$6875
2006-12-15 10:52 pm
y=6875
2006-12-03 9:59 pm
y*(1+8%)-y*(1-8%)=1100
1.08y-0.92y=1100
0.16y=1100
y=6875
1.08y-0.92y=1100
0.16y=1100
y=6875
收錄日期: 2021-04-13 14:31:24
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