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By Elimination:
We can add the equations together because +2y and -2y will cancel out: 2x + 4x = 14 + 10
This gives 6x = 24, so x = 4
We can put x back int...

We can call the sides of the equal lengths "x".
We can then make an equation to satisfy the relationship between the perimeter and the length of the sides as follows:
x + x + x + (x + ...

Divide 135 by 3/8 OR multiply 135 by 8/3
135 * 8/3 = 360
You can do this in steps by starting with:
135/3 = 45, then multiply by 8.
OR
135 * 8 = 1080, then divid...

The differential is the slope of the graph at any point. So if we imagine a cosine in our heads, it starts at a peak and goes down to a negative peak. So in terms of the gradient (or slope) it starts at 0...

f'(x)=lim(h->0) of [f(x+h)-f(x)]/h. In the case where f(x)=x^n, we have that f(x+h)-f(x)=h*nx^(n-1) + (h^2)*p(x) for a polynomial p(x), shown by binomially expanding f(x+h). Then dividing through by h ...