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3x+2y=18, 2x-y=5 solve for x and y

x=4 y=3
BB
Answered by Benjamin B. • Maths tutor
5972 Views

What is meant by the term specific heat capacity?

Specific heat capacity does tell you how much energy a substance needs to increase their temperature and so substances with a low specific heat capacity (SHC) will increase in temperature more rapidly than t...
TM
13805 Views

How do I solve simultaneous equations graphically? e.g (1) 4x - 3y = 11 (2) 3x + 2y = 4

Firstly, let's rewrite each of these equations as the equation of a line i.e. in terms of y. So we have: (1) y = 4x/3 - 11/3 (2) y = 2 - 3x/2 Draw line (1) on a graph. The (x,y) co-ordinates of any point on ...
DL
Answered by Daniel L. • Maths tutor
4000 Views

Jodie buys 12 cans of cola. There are 330 ml of cola in each can. Rob buys 4 bottles of cola. There is 1 litre of cola in each bottle. Rob buys more cola than Jodie. How much more?

The answer is: (4X1000)-(12X330)= 40, ao 40 ml more. You may wonder why 1 litre is 1000, as 1 litre of cola= 1000 ml of cola so we have to convert 1 L to 1000ml in the anwer. Rob buys more cola than Jodie me...
MK
Answered by Michelle K. • Maths tutor
3798 Views

How to I factorise a quadratic equation?

I think the best way to show how to do this is with an example "Factorise 6x 2 + 7x - 3" Looking at that expression, we can't factorise it straight away, so we'll have to rewrite it in a way that a...
DB
Answered by Daisy B. • Maths tutor
6079 Views