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This question is worth 4 marks and requires us to work with the information we are given. To set this up clearly, I would suggest drawing out a table with the three activities listed down the side and mal...

In order to solve the simultaneous equations, you should first get rid of one of the unknowns. In this case, one of the ways to do this is to multiply both sides of the first equation by 5 (2x+3y=17 =&g...

This question requires 2 logical steps. The first is to calculate how many balls Tom and Amy have after the transaction. The second is to use a formula to calculate the percentage of balls left . Reading ...

Answer: 4x³ + 12x²y + 9xy² - 16x² - 48xy - 36y²

y = 2 (-1)² -5(-1) -1y = 2 + 10 - 1y = 11y = 2 (2)² -5(2) -1y = 8 - 10 -1y = -3