數學題(5)
2007-01-01 10:28 pm
舞台劇的票價分成人和學生兩種,分別是每張$75和$30.若該舞台劇其中一場的總收入是$72000,而該場的入場觀眾有1200人,問售出學生票多少張?
回答 (5)
2007-01-01 10:32 pm
✔ 最佳答案
設售出學生票x張75(1200-x) + 30x = 72000
90000 - 75x + 30x = 72000
90000 - 45x = 72000
72000 + 45x = 90000
45x = 90000 - 72000
45x = 18000
x = 18000/45
x = 400
所以售出學生票400張
2007-01-01 14:34:07 補充：
因為只有成人票和學生票, 所以不是學生票的都是成人票即有1200-x張成人票售出成人票的收入即是$75(1200-x)而售出學生票的收入是$30x
參考: me
2007-01-10 8:22 pm
30x + 75 (1200 - x) = 72000
30x -75x + 90000 = 72000
45x = 18000
x = 400
30x -75x + 90000 = 72000
45x = 18000
x = 400
2007-01-01 10:38 pm
A=Adult
S=Student
1) 75A+30S=72000
2) A+S=1200
A+S=1200
A=1200-S
75A+30S=72000
75(1200-S)+30S=72000
90000-75S+30S=72000
90000-45S=72000
18000=45S
S=400
Answer: 400 Students
S=Student
1) 75A+30S=72000
2) A+S=1200
A+S=1200
A=1200-S
75A+30S=72000
75(1200-S)+30S=72000
90000-75S+30S=72000
90000-45S=72000
18000=45S
S=400
Answer: 400 Students
2007-01-01 10:34 pm
設成人票賣出y張
所以學生票賣出1200-y張
75y+30(1200-y)=72000
75y+36000-30y=72000
45y=36000
y=800
成人票賣出800張
學生票賣出1200-800=400張
所以學生票賣出1200-y張
75y+30(1200-y)=72000
75y+36000-30y=72000
45y=36000
y=800
成人票賣出800張
學生票賣出1200-800=400張
參考: 我會考數攞A
2007-01-01 10:33 pm
75 * a + 30 * b = 72000
a + b = 1200
75 * a + 30 * (1200 - a) = 72000
75 * a + 36000 - 30 * a = 72000
(75 - 30) * a = 72000 - 36000
45 * a = 36000
a = 800
800 + b = 1200
b = 1200 - 800 = 400
所以共售出400張學生票。
a + b = 1200
75 * a + 30 * (1200 - a) = 72000
75 * a + 36000 - 30 * a = 72000
(75 - 30) * a = 72000 - 36000
45 * a = 36000
a = 800
800 + b = 1200
b = 1200 - 800 = 400
所以共售出400張學生票。
參考: me
收錄日期: 2021-04-12 17:47:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070101000051KK02105