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The ratio of Adam's age to Bob's age is 1:2. In 12 years time, the ratio of their ages will be 3:5. Calculate their current ages.

Now: In 12 years:A:B A:B1:2x:2x x+12:2x+12 = 3:5
x+12 = 2x+123 55(x+12) = 3(2x+12)5x + 60 = 6x + 36x = 24
A:B Adam = 24, Bob = 48x:2x24:2(24)24:48

Answered by Aaron S. • Maths tutor

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Find the binomial expansion of (-8+4x)^(2/3) up to and including the term in x^2.

The formula booklet is useful for this type of question, but only once we've rearranged the expression into the correct form. The formula booklet expression is: (1 + z)^n = 1 + nz + 0.5n*(n-1)

Answered by David M. • Maths tutor

3821 Views

How do the colleges work at Cambridge / Oxford, and how should I decide which college to apply to?

Both Cambridge and Oxford are made up of a number of distinct colleges. A simple comparison would be to think of the fictional houses of Hogwarts.Functionally, most students live within college accommodat...

Answered by David M. • Oxbridge Preparation tutor

1563 Views

Simplify: 2x + 6y + 2y - x

Step 1) Rearrange the equation as follows: (2x - x) + (6y + 2y) this makes it easier to see which values you can add together.Step 2) Solve the calculation in each bracket: x + 8y. Successfully simplifyin...

Answered by Benjamin L. • Maths tutor

3197 Views

How does the ELAT differ from a normal A' level essay and what are the best ways to prepare?

An ELAT essay is similar to an A' level essay in preparation and different in execution. Unlike an A' level essay, the ELAT allows for a freedom of thought and a flow of ideas. Where in the A' level exami...

Answered by Molly I. • ELAT tutor

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