Top answers


How to structure an A-level History essay?

The important part to any History A-Level is the structure, as it not only shows the examiner your understanding of the question but also your level of knowledge. As an effectively structured argument can ma...
IH
Answered by Imogen H. History tutor
14585 Views

How do you find the prime factorisation of a large number like 420?

You start by dividing 420 by whichever numbers you know that it is divisible by. 420 is obviously divisible by 10 so you can start with 10 x 42. Then, you factorise 10 and 10 = 2 x 5, so now we know 420 = 2 ...
AA
Answered by Abisayo A. Maths tutor
4060 Views

How does the Meselson and Stahl Experiment provide evidence for the semi conservative theory of DNA replication?

Before we start on the specifics of the experiment itself we need to understand how DNA replication occurs on a molecular level . DNA is made up of four different bases; A, C, G and T. Each base is attached ...
JD
Answered by Julia D. Biology tutor
27403 Views

How do you solve the simultaneous equation, 7x – 20 = 3x + 4?

To solve this equation we want to find the value of one unknown, x. The solution will be x = ___. So first we need to put all the terms with x on one side of the =, and all the constants on the other side. T...
AA
Answered by Abisayo A. Maths tutor
5662 Views

Why do some verbs take avoir and some verbs take être in the perfect tense and how can I remember which ones?

Many methods will tell you that verbs of movement take être in the perfect tense but that's not very helpful, since many verbs of movement do not use “être”, such as “danser (to dance), sauter (to jump), cou...
CM
Answered by Ciarán M. French tutor
10444 Views