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32 out of 80 on a Maths test38% on an English testAs we don't know any other information about the English test (e.g. her mark and the total mark) the only way that we can compare the two...

 a) 3x + 5y =  26  

b) 2x + 2y = 12

Step One: We need to find a way to equate either the x terms of the y terms in each equation. Multiply equation a) by 2 ...

This is a function which is in the form, 

y = f(x)g(x)

It's the product of two functions and so we must make use of the product rule. This i...

To differentiate x^2

Step 1) whatever the number on the power, put that in front of x. 

Step 2) Then minus one (-1)  from the power

Therefore, by putting the n...

(1) 2x - 5y = 11(2) 3x + 2y = 7-----------------------Multiply equation (1) by 3 & Multiply equation (2) by 2 to give equal values for x:(3) 6x - 15y = 33(4) 6x + 4y = 14-----------------------Take eq...