A department store sells a bag and a swim suit at a profit of 30% and 40% respectively. The marked price of the bag is highter than that of the swim suit by $50.
(a)Suppore the cost price of the bag is $a.Express the marked prices of the bag and the swim suit in terms of a.
(b)If the total marked price of the bag and the swim suit is $470, find the cost price of the bag and the swim suit.
thx~~
數學題唔識(急用)
2007-03-16 3:52 am
回答 (2)
2007-03-16 4:06 am
✔ 最佳答案
a) let y be the marked prices of the bag. y=a(1+30*)
y=1.3a
so the marked prices of the bag is $1.3a.
the marked price of the swim suit= $(1.3a-50)
b) 1.3a+1.3a-50=470
2.6a=520
a=200
therefore the cost price of the bag is $200.
let $z be the cost price of the swim suit.
1.3a-50=z(1+40%)
1.3(200)-50=1.4z
z=150
therefore the cost price of the swim suit is $150
參考: me
2007-03-16 4:04 am
Let a be the cost of bag
let b be the cost of swim
1.3a-50=1.4b
b=(1.3a-50)/1.4
b) 1.3a+1.4b=470
1.3a+1.3a-50=470
a=200
b=150
let b be the cost of swim
1.3a-50=1.4b
b=(1.3a-50)/1.4
b) 1.3a+1.4b=470
1.3a+1.3a-50=470
a=200
b=150
收錄日期: 2021-04-18 21:07:04
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070315000051KK03639