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A curve crosses the x-axis when y=0, if we put that into the equation above we get the quadratic equation 0=8-4x-2x². The solutions to this equation are the values of x where y=0, which is the ...

This question was very difficult to explain through words; if it were to be used in a question paper, it would be presented as a diagram. I intend to use the whiteboard during the inteview to explain both...

You are trying to find out the value of 'x' and the value of 'y'. 

This means that you need to be able to take away one equation from the other. 

3x + 2y = 4 - we are going to times this equ...

A stone, of mass m, falls vertically downwards under gravity through still water. At time t, the stone has speed v and it experiences a resistance force of magnitude lmv, where l is a constant.  QUESTION:...

5x+6y=3 2x-3y=12 6y=3-5x 2x=12+3y 3y=2x-12 Therefore, 6y=2(2x-12)=4x-24 4x-24=3-5x 9x=27 x=3