Top answers

All subjects
All levels

How does the 3D dash and wedge notation work?

To make life easier we often treat molecules as flat - for example we draw methane on a page as a carbon with 4 hydrogens bonded to it at perfect 90 degree angles. This isn't really the case. Electron-ele...

DM
Answered by Dario M. Chemistry tutor
7407 Views

Express 3(x^2) - 12x + 5 in the form a(x - b)^2 - c.

Starting with a(x - b)^2 - c, if we expand the bracket we get:

a(x^2 - 2xb + b^2) -c

Since we need to end up with the coefficient on x^2 being 3 and in the expression above x^2 is only multi...

LH
Answered by Lucy H. Maths tutor
10712 Views

What does ELISA measure?

ELISA, an acronym for enzyme linken immunoabsorbant assay, is a means of measuring the amount of a specific antibody in serum through treating a 96 well plate with antigens that stick well to the plastic ...

KM
Answered by Kyle M. Biology tutor
4627 Views

What is historiography and how can it be used in an exam essay?

Historiography is history as written by academics who are experts in the areas they have studied, and so their commentary and interpretations are regarded as reliable and credible. Though not explicitly n...

CR
Answered by Chloe R. History tutor
2789 Views

Why do firms only make normal profit in a perfectly competitive market?

Under a perfectly competitive market, there are a large number of buyers and sellers, where each of them are price-takers. If we imagine a supply and demand diagram, the S=D at equilbrium. If firms are in...

SS
Answered by Shivani S. Economics tutor
5548 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning