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When solving simultaneous equations our goal is always to use the equations given, which each have two unknowns in them, in order to find an equation with only one unknown. In this example, we can see tha...

A=5 when B=7, B=4 when C=5. (Using Ratios, 5:7 & 4:5)
Knowing the relationship between both A & C with B means that we can find the relationship between A&C themselves. (A=5, B=7)*4 ; ...

First I would draw a Diagram of y=x² on the x and y plane, for x>0. Then label a generic point as (x,y), then noting that as y=x² we can then equate the sane point to (x, x^2...

Check to see if the number in front (coefficient) of either the x's or y's is the same. In this case both the y's have the same coefficient so we do not need to make them the same.We are going to add the ...

A stationary point is defined as a point on the function where the gradient is zero, i.e f'(x) = 0. To construct this equation we must differentiate the function, we would find f'...