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White paint costs £2.80 per litre. Blue paint costs £3.50 per litre. White paint and blue paint are mixed in the ratio 3 : 2. Work out the cost of 18 litres of the mixture.

The ratio given tells us that our paint mixture of 18 litres consists of 3 + 2 = 5 parts . Each part therefore consists of 18/5 = 3.6 litres of paint . If we need 3 parts white paint, thats: 3 (parts) x 2.80...
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Answered by Vicente O. Maths tutor
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How does Shakespeare use Poetic Language in Romeo & Juliet?

The use of poetic language in Romeo & Juliet throughout the play is both consistent and wildly contrasting at different points, with both poetry and prose being used throughout. Upon Analysis, we may obs...
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A curve C has the equation x^3 + 2xy- x - y^3 -20 = 0. Find dy/dx in terms of x and y.

Every term needs to be differentiated in terms of x: For the x 3 term , differentiated it becomes 3x 2 (multiply the whole term by the initial power, 3, and the reduce the power by 1 and replace it, 3 theref...
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Answered by Seb T. Maths tutor
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Why is the derivative of a function its gradient?

So, the easiest way to start thinking about this is by looking at straight lines. The gradient of a straight line is just its slope, which is the difference in the y values between any two points, divided by...
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Answered by Connor G. Maths tutor
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What are the main macroeconomics variables?

There are 4 main macroeconomic variables that policymakers should try and manage: 1) Balance of Payments 2) Inflation 3) Economic Growth 4) Unemployment This can be easily remembered using the following acro...
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Answered by Aidan G. Economics tutor
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