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Solve the following simultaneous equations: 2a-5b=11, 3a+2b=7

Let 2a-5b=11 be Equation 1 and 3a+2b=7 be Equation 2. To find a and b, we first need to eliminate one of these variables from the equation. Firstly we can eliminate a from both equations to find b. To do thi...
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Answered by Gemma C. • Maths tutor
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If y = 2(x^2+1)^3, what is dy/dx?

Since the equation for y is a composite function (applying one function to another function) we need to use the chain rule to answer this question. Firstly let u = x^2+1 . This allows us to write y = 2u^3. D...
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Answered by Gemma C. • Maths tutor
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What makes you a good teacher of the subject?

I have always had an interest for the subject and find it very interesting. I have achieved both GCSE and A-Level biology and am currently studying Biochemistry with Genetics at university. I understand the ...
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Answered by Ruth E. • Biology tutor
3637 Views

What is price elasticity of demand and how is it measured?

Price elasticity of demand (PED) measures the responsiveness of percentage change in the quantity demanded of a good with respect to a percentage change in the price of a good. It is measured by the formula:...
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Answered by Hadiqa Z. • Economics tutor
16281 Views

What are the causes of diseconomies of scale?

Diseconomies of scale occurs when the average cost of a product begins rising as a business expands. This may occur due to problems communicating: as a business expands it's chain of command increases which ...
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