Posted by **LC** on Monday, October 29, 2012 at 11:49pm.

I thought it was similar so I wrote...

x + y = 30cm^3

x + 2y = 61.5cm^3

i.e

2x + 2y =60cm^3

x + 2y = 61.5cm^3

therefore

x= -1.5cm^3(volume of methane)

and

y= {61.5-(-1.5)}/2= 31.5cm^3(volume of ethane)

However my teacher said the volume i got for ethane is wrong, because my second equation(x+2y) should not be equal to 61.5cm^3.... so this is why I am lost. I tried to follow your previous example though. So I need your help again.

As a hint she she gave us this...

61.5cm^3- (A + 2B)= 100- (2A+ 3 and a 1/2B)...I have no idea what this is.

## Answer This Question

## Related Questions

- a - A rectangle is 3times as long as it is wide the perimeter is 60cm. Find the ...
- Geometry - Find the surface area for each of the following Rt. Square Pyramid 6....
- math - micheal drew a triangle with the sides measuring 12.5cm,30cm,32.5cm. ...
- geometry regular polygon - a=? s=10.5cm A= 19,887.5cm squared Pentagon A=asn/2 ...
- Physics - A 492g oscillator has a speed of 99.5cm/s when its displacement is 3....
- Physics - A 395cm oscillator has a speed of 104.5cm/s when its displacement is 2...
- maths - A carton of dimension 30cm by 15cm by10cm is used to store match boxes ...
- math - the external dimensions of a closed box are 8cm by 5cm by 4cm. given that...
- math - a 5cm by 5cm square is cut from each corner of a rectangular piece of ...
- Maths - Find area of trapezium ABCD ;AB||DC in which AB=9cm,DC=4cm,AD=5cm and BC...

More Related Questions