Qualification > Math
IGCSE MATHS Doubts
ksitna:
--- Quote from: SoONa on May 18, 2010, 11:06:59 pm ---yaaaaaaaaaay thank u
--- End quote ---
anytime :)
NidZ- Hero:
GOOD LUCK EVERYONE
JUST CHILL
AND HAVE FUN MATHS IS EASY (i shuld nt be de one sayin it ) ;D :) ;)
Shazizzzle:
--- Quote from: ksitna on May 18, 2010, 11:03:54 pm ---i neeed help with this
oct nov 06
8 b) iv)
--- End quote ---
Q8.
b) i) Bottles: Total money/money per bottle
60.30/0.45 (45 cents = 0.45 dollars)
ii) Since both are cents, simply write the equation. x/45
iii) x-75/48
iv) Now, the number of bottles sold on tuesday were 7 more than on wednesday. Than means, wednesday lacked 7 to be equal to tuesday.
So in the eq, you give wednesday 7 more, to make it equal to tuesday. Then you put an equality and form an equation!
So No. of bottles sold on tuesday = no. of bottles sold on wednesday + 7
x/45 = x-75/48 + 7
48x - 15120 = 45x - 3375
x=3915
ksitna:
--- Quote from: Shazizzzle on May 18, 2010, 11:20:00 pm ---Q8.
b) i) Bottles: Total money/money per bottle
60.30/0.45 (45 cents = 0.45 dollars)
ii) Since both are cents, simply write the equation. x/45
iii) x-75/48
iv) Now, the number of bottles sold on tuesday were 7 more than on wednesday. Than means, wednesday lacked 7 to be equal to tuesday.
So in the eq, you give wednesday 7 more, to make it equal to tuesday. Then you put an equality and form an equation!
So No. of bottles sold on tuesday = no. of bottles sold on wednesday + 7
x/45 = x-75/48 + 7
48x - 15120 = 45x - 3375
x=3915
--- End quote ---
OHHH i thought we had to multiply by 7
oh thank you so much!
Vin:
--- Quote from: ksitna on May 18, 2010, 11:03:54 pm ---i neeed help with this
oct nov 06
8 b) iv)
--- End quote ---
8 b) iv) easy !!
x/45 - 7 = x - 75/46
x-315/45 = x-75/48
interchange denominators
48 ( x - 315) = 45 ( x - 75)
48x - 15120 = 45x - 3375
3x = 11745
x=3915
comon wats wrong with u !!
..
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