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So with simultaneous equations we want to try and eliminate one of the unknowns we have. In this case, they are a and b. If we label the two equations 1 and 2 we have to find a way to reduce the equations...

120 g of sugar is required for 4 people
Therefore 120/4=30 g of sugar is required per person.
So 30x7=210 g of sugar is required to make a cake for 7 people.

Begin by finding the difference between each consecutive term11-8=314-11=317-14=3
This shows that to get to the next term of the sequence, you add 3.
Therefore the next term of the sequence is ...

Begin by assuming that √2 is rational, and can therefore be written as √2 = p\q where p and q are coprime integers.By squaring both sides, you get the result 2 = p²\q², which rearran...

Using both the Chain Rule and the Product Rule for derivatives, we find the answer to be: dy/dx = e^(2x)[2cos(3x) - 3sin(3x)]