This website requires Javascript to function properly. Please go to the setting of your web browser and enable Javascript for this website.

Ad by

推荐 OXIO 加拿大高速网络，最低月费仅$40. 使用推荐码 RCR37MB 可获得一个月的免费服务

Ad by

推荐 OXIO 加拿大高速网络，最低月费仅$40. 使用推荐码 RCR37MB 可获得一个月的免费服务

我小孩有道题不会做，想请大家帮忙。

bilinguist(不平则鸣)

The cost of taking a class to a beach party is partly constant and partly varies
inversely as the number of students.If 12 students are taken,then it costs each student $4.
If 30 students were to go it would cost each student $1.20.
a)What would it cost to take 60 students?
b)What costs would be included as part of the constant cost?

Answer: a) 32

hint: T=S+kn where k is the constant of variation
n is the number of copies
S is the fixed cost
T is the total cost

(#807691@0)
Last Updated: 2002-10-20
This post has been archived. It cannot be replied.

Report

Replies, comments and Discussions:

枫下家园 / 家庭与子女 / 我小孩有道题不会做，想请大家帮忙。 -bilinguist(不平则鸣); 2002-10-20 {537} (#807691@0)
The cost of taking a class to a beach party is partly constant and partly varies
inversely as the number of students.If 12 students are taken,then it costs each student $4.
If 30 students were to go it would cost each student $1.20.
a)What would it cost to take 60 students?
b)What costs would be included as part of the constant cost?

Answer: a) 32

hint: T=S+kn where k is the constant of variation
n is the number of copies
S is the fixed cost
T is the total cost

(1). 12X4=S+12K (2). 30X1.2=S+30K 计算: K=-2/3 S=56 然后 T=56+60X(-2/3)=16... 不会了 -midnightblues(和starinfo开中介); 2002-10-20 (#807703@0)
56 -laoyou(老游); 2002-10-20 (#807704@0)
S = 28 -jeffrey815(Smartiecat); 2002-10-20 {165} (#807750@0)
K is inversely so the equation goes

T = S + K/N

48 = S + K/12
36 = S + K/30

S = 28
K = 240

a) When n = 60, T = 28 + 4 =32.
b) Constant cost is S = 28.

hahahaha, inversely. 我估计现在读小学我都不及格了, :((((((((( -midnightblues(和starinfo开中介); 2002-10-20 (#807755@0)
Yes. Thank you! Only you are right up till now! Thank you very much! -bilinguist(不平则鸣); 2002-10-20 (#807802@0)

@Florida

我小孩有道题不会做，想请大家帮忙。

Replies, comments and Discussions:

More Topics