IGCSE MATHS Doubts

[ksitna]

yaaaaaaaaaay thank u

anytime

[NidZ- Hero]

GOOD LUCK EVERYONE
JUST CHILL
AND HAVE FUN MATHS IS EASY (i shuld nt be de one sayin it )

[Shazizzzle]

i neeed help with this
oct nov 06
8 b) iv)

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]

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

OHHH i thought we had to multiply by 7
oh thank you so much!

[Vin]

i neeed help with this
oct nov 06
8 b) iv)

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 !!


..

[NidZ- Hero]

plzzzz can any1 help me wid o/n 2002 3c(iv) hw vil we noe dat R (-1,7)

[thenewkid™]

hv my p4 in 6 hrs

[takamorinki]

my paper is 4 hours from now ~

[6394]

mine is 4 hrs as well
mns u ll be givin invarriant 2 n u live in uae
By the way total surface area of pipe will be=2<pie>r^2+2<pie>rh -2<pie>r^2
tooo complicated lol

[6394]

mine is 4 hrs as well
mns u ll be givin invarriant 2 n u live in uae
By the way total surface area of pipe will be=2<pie>r^2+2<pie>rh -2<pie>r^2
tooo complicated lol

2 <Pie>r h is the formula for findin area of a hollow pipe!!!!
m i ryt
 

[thenewkid™]

2 <Pie>r h is the formula for findin area of a hollow pipe!!!!
m i ryt
 

its the formula 4 finding the volume of a solid cylinder

[thenewkid™]

its the formula 4 finding the volume of a solid cylinder

i mean 2 pi r^h

[thenewkid™]

2 pi r h
sry

[thenewkid™]

my paper 4 is today as well! Sad just a few hours away
can anyone help me out with this question? i can't use trig to calculate this angle, probably just missing something really easy cuz of stress and lack of sleep: June 2005, Paper 4 question 2e

thanks a lotttt!

3 hrs left
make a straight line down C and u'll get 90 at the bottom then cont using trig

[thenewkid™]

also, do we have to know how to make scale drawings for our current syllabus? i've never practiced it before, ever...does anyone think that will come on the paper today?

there are chances but dont worry. just convert all the units to cm or mm or whatever then use the scale factor as a ratio eg;  1cm:20000000cm