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The gradient of a curve is defined as Dy/dx = 3x^2 + 3x and it passes through the point (0,0), what is the equation of the curve

Integrate this = (3x^3)/3 + (3x^2)/2 + c So y = x^3 + (3x^2)/2 + c Using point (0,0), 0 = 0 + 0 + c so c = 0. Full equation of the curve is therefore x^3 + (3x^2)/2
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Answered by Laura T. • Maths tutor
6364 Views

Simplify fully: (5 +√7)/ (2+√7)

Can show working on a whiteboard.
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Answered by Tony A. • Maths tutor
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Describe how the RER is involved in the production of enzymes. [2 marks] June 2014

To attain the two marks you have to say that the RER contains ribosomes and these synthesis proteins. Enzymes are specialised proteins.
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Answered by Tony A. • Biology tutor
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A naturally occurring sample of the element boron has a relative atomic mass of 10.8 In this sample, boron exists as two isotopes. Calculate the percentage abundance of 10B in this naturally occurring sample of boron.

The answer is 20%. This is a failry common question and stomps many students. The easiest way to answer this question, in my opinion, is to see that this question is asking you to figure out the ratio of iso...
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Answered by Tony A. • Chemistry tutor
40431 Views

Can I have some guidance on the correct answer for this word order, grammar question?

Here's an example: 'On each biscuit (was wrote) (wrote) (write) (was written) (was writ) a word in bright pink icing.' For this type of question you will need to circle the correct word(s) that are shown her...
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Answered by Ella M. • Maths tutor
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