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2x + y = 12. P = xy^2. Show that P = 4x^3 - 48x^2 + 144x

We want to make P = xy^2 into something more complicated, which only has Xs, and no Ys. Firstly, you need to remember that when there are two equations, the question will almost definitely involve substituti...
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Answered by Jethro R. • Maths tutor
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Describe how the velocity and forces acting on a skydiver change during their fall (6 marks)

Different exam boards may want a different format of answer, so before beginning this question, it would be worth thinking how other six mark questions are marked in other papers. Edexcel want the student to...
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Answered by Jethro R. • Physics tutor
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Expand and simplify 3(x-2) -2(x+2)

Notice that the questions specifies that you should expand and simplify. This means expanding the equations is a good idea. To expand the equation, we will start by expanding each brackets. 3(x-2)-2(x+2) =3x...
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Answered by Phrances P. • Maths tutor
8220 Views

How can I show off my intellectual curiosity without reciting all the books I've read and sounding pretentious or like I'm listing everything I know

A personal statement, no matter where you apply to, is a chance for you to show off intellectually and prove to the reader that you are curious, ambitious and daring. At Oxbridge especially, supervisors and ...
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Find an equation of the line which passes through the point (4,-7) and has slope 3.

To find the answer to this, we can use the point-slope form. To do this: y - (-7) = 3 (x - 4) Simplified: y + 7 = 3x - 12 : y = 3x - 19
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Answered by Tierney R. • Maths tutor
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