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How can I revise for an English exam?

Many people allow English to fall to the bottom of their priority list when revising for exams. Unlike other academic subjects, English is not a sequence of learning facts for a simple question and answer...

Answered by Alexandra P. • English tutor

3000 Views

Rearranging equations

Quesiton:

Solve 10x - 7 = 5x + 3, to find the value of x

Answer:

x = 0.5

Solution:

Answered by Hamid S. • Maths tutor

4489 Views

f(x) = (4x + 1)/(x - 2). Find f'(x)

Quotient rule: (vu' - uv')/v^2

u = 4x + 1

u' = 4

v = x - 2

v' = 1

Input into formula:

[(x - 2)(4) - (4...

Answered by Salah S. • Maths tutor

12872 Views

The curve C has polar equation 'r = 3a(1 + cos(x)). The tangent to C at point A is parallel to the initial line. Find the co-ordinates of A. 0<x<pi

Tangent is parallel, therefore (dy/dx)=0.

Find y:

y = r sin(x) = 3a(1 + cos(x))(sin(x))

Differentiate y with respect to x

dy/dx = 3a[(2cos(x) - 1...

Answered by Salah S. • Further Mathematics tutor

6795 Views

What characteristics might a perfectly competitive market have? Choose 3 (6 marks)

The first characteristic is that the products are homogenous, meaning there is little difference between the quality of the goods being sold by the individual firms.

The second characteri...

Answered by Salah S. • Economics tutor

2859 Views