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Consumer surplus can be thought of as the feeling of getting a really good deal or a bargain. It happens when you would have been willing to pay an amount for something but the price was actually lower. W...

so we know that A+B+C= 72. We also know that B=2A (1) and C=3B which means C=6A (2) and with this information we can re arrange to equation to be only have one variable. so A+2A+6A= 72 Collecting all the ...

In general, pupils from a working class background tend to achieve lower grades than those from a middle-class background.This may be because working class children do not have the same resources as middl...

This question is tricky/unfair because you need to understand how meters work. The old reading was the last time the electricity bill was paid for, so the first thing you need to do is 7580-7510= 70. So t...

sub the y value into the first eqn 2x + 3(3x-5) = 18 expand the brackets 2x +9x-15 = 18 add up the x values 11x -15 = 18 a...