Search our library of A Level questions

Top answers

All subjects

A Level

Write 5x^2 + 30x + 36 in the form 5(x+A)^2+B where A and B are integers to be found.Then write the equation of symmetry for the graph of 5x^2 + 30x + 36

-Take factor of 5 out as seen in question.-Expand the brackets-Then draw a sketch of the graph -Then understand what type of graph it is and what it means about the line of symmetry.

Answered by • Maths tutor

3342 Views

How do I work out the equation of a tangent line to a curve?

A tangent line to a point of a curve is the straight line which is parallel to the the curve at that point.The equation of any straight line has equation form : y-y_1 = m(x-x_1) where m is the gradient of...

Answered by • Maths tutor

4126 Views

Under what circumstances is the present or imperfect subjunctive used?

Present subjunctive is used when the subjunctive setup is in present or future tenses. For example "Quiero que me hagas un favor" or "Va a ser necesario que me hagas...

Answered by Angus G. • Spanish tutor

1847 Views

Applying material from Item A and your own knowledge, evaluate the usefulness of subcultural approaches in understanding crime and deviance (30 marks)

Understanding why crime and deviance has occurred and continues to do so has been a topic debated often with sociologists at the forefront. There are various different views as to why this is the case inc...

Answered by • Sociology tutor

6703 Views

Describe and explain the structure of Benzene

Benzene has a planar structure with a bond angle of 120. The bonds between the carbon atoms in the ring are identical in strength and length. The length of the carbon-carbon bonds in benzene is intermedia...

Answered by • Chemistry tutor

2846 Views