1.if the cost price and the selling price of a computer are$C and $S respectively,the profit per cent x% can be calculated by the following formula:
x=100(S-C)/C
a)make C the subject of the formula
b)If x=10 and S+16000 ,find the vale of C
c)if the selling price of a computer is $15000 and the profit percent is 25%,find the cost of 2 computers
THX~~~!!!
Maths x 1(THX)(form 2)
2006-11-24 5:35 am
回答 (2)
2006-11-24 5:56 am
✔ 最佳答案
(A)x=100(S-C)/C
Cx=100S-100C
Cx+100C=100S
C(x+100)=100S
C=100S/(x+100)
(B) C=100*16000/(110)=160000/11大約$14545.45
(C) S=$15000,x=25
C=100*15000/125=12000
then cost of 2 computers=$24000
2006-11-24 3:35 pm
a)make C the subject of the formula
x=100(S-C)/C
x= (100S-C)/C
Cx=100S-C
Cx+C=100S
C(x+1)=100S
C= 100S /(x+1)
b) the value of C
C=100(16000)/(10+1)
C=1600000/11
C= 145454.545(corr to 3 sign. figures)
x=100(S-C)/C
x= (100S-C)/C
Cx=100S-C
Cx+C=100S
C(x+1)=100S
C= 100S /(x+1)
b) the value of C
C=100(16000)/(10+1)
C=1600000/11
C= 145454.545(corr to 3 sign. figures)
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