Fanny mad a profit of $1020 on selling sports shoes and slippers. The profits from selling a pair of sports and slippers are $40 and $25 respectively. Suppose that 30 pairs of shoes are sold of which x pairs are sports shoes.
(a) Express the total profit from selling the slippers.
(b) Find the value of x.
請幫忙計算及列式
2010-10-06 5:44 am
回答 (1)
2010-10-06 5:52 am
✔ 最佳答案
Let a be the number of pairs sports shoes sold and b be the number of pairs slippers sold.40a+25b=1020------------(1)
a+b=30-----------------------(2)
From (2):
a=30-b
Sub a into (1):
40(30-b)+25b=1020
b=12
Sub b into (2):
a+12=30
a=18
Slippers = 12 pairs
(a) (12/30)*1020
=$408
The total profit from selling the slippers are $408.
(b) x=number of pairs of sports shoes
a=number of pairs of sports shoes
a=x a=18 x=18
The value of x is 18.
參考: me
收錄日期: 2021-04-23 18:27:19
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