Search our library of homework questions

Top answers

All subjects

All levels

Simplify: ((3x^2)-x-2)/(x-1).

Firstly, simplify the numerator by factorising the quadratic, to give a numerator of (3x+2)(x-1). Now, divide through by (x-1), to give (3x+2).

Answered by Oscar K. • Maths tutor

3769 Views

What is the name of the compound with the formula CH3CH2CH(OH)CH3, and what is the name of its functional group?

The compound's name is butan-2-ol: four carbons in the chain means the compound has the but- prefix; the alcohol group is on the second carbon, so the compound has the -2- suffix; and the functional group...

Answered by Oscar K. • Chemistry tutor

27828 Views

Explain the chain rule of differentiation

The chain rule can be used to find more complex derivatives.For example, in the case of: y = (5x + 2)⁵To find the derivative in the ordinary fashion, one would need to expand the brackets to:y=...

Answered by Toby H. • Maths tutor

3806 Views

'Describe how journalists may approach the issue of pupil behaviour in British schools differently from sociologists' [4 marks]

To answer this question, we identify the action (to describe), the focus (journalist versus sociologist approach on pupil behaviour) and the argument (

Answered by Eva S. • Sociology tutor

1952 Views

Explain why there is a surplus of solar energy in tropical latitudes and a deficit towards the poles (4)

1. Curvature of the earth + Angle of Incidence - The suns angle in the sky decreases towards the poles due to the curvature of the earth, which spreads the heat energy over a larger surfac...

Answered by Katy W. • Geography tutor

5900 Views