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To answer this question, we first need to work out the factors of 21. These are the whole numbers which multiply to make 21. We know that 1 multiplies with 21 to make 21, so they are both factors. 2 is no...

To begin, we need to do the division 106/6. We know that 6 does not go into 1, so we can carry the one and see how many 6s go into 10.We can see that 6 goes into 10 once, with a remainder of 4, so we can ...

We can use the formula method (for solving quadratic equations) to find 'roots' or values of x that satisfy or 'work out' for a given quadratic equation of an unknown variable (say x.) The formula is:x=-b...

Assuming the correct tools of differentiation have been taught, we can tackle each term seperately and then rearrange to have dy/dx as the subject.

Taking a look at the first term, x^2,  ...

Equation 1) x² +y²=5  (Equation 2) y=3x+1

The value of x is the same in both equations, as is the value of y. Therefore we can use one to work out the other. for exa...