Top answers

What does it mean to "complete the square"?

Completing the square is a useful method of rearranging a quadratic equation so the unknown ("x") only appears in it once. The theory of completing the square tells us that we can take a quadratic ...
CG
Answered by Caitlin G. • Maths tutor
4838 Views

What are the major components required for a oil accumulation to form.

For a hydrocarbon (oil or gas) accumulation to form a source rock, reservoir rock and cap/seal rock are required. A trapping mechanism is also essential and this can be structural or stratigraphic. A source ...
ZC
Answered by Zoe C. • Geology tutor
2811 Views

What are the differences between the preterite and the imperfect tenses?

Both tenses refer to actions in the past. The preterite is used to describe actions in the past that have been completed. Exampe: Fuí al baile anoche- I went to the dance last night. The verb ir is in the pr...
RK
Answered by Rositza K. • Spanish tutor
2165 Views

How to write a letter to friend in spanish?Tu amigo español acaba de celebrar su cumpleaños te escribe para preguntarte sobre tu colegio y tus planes para el futuro. Escríbele una carta.

As with writing a letter in English, it is important to adopt the correct register and tone for the person you are writing to. To open your letter, use one of the following options picking the best one that ...
RK
Answered by Rositza K. • Spanish tutor
7182 Views

How best should I prepare for my Cambridge (Oxford) interview for Economics?

The best way to prepare for your Oxbridge Economics interview is to be on top of all your A-level mathematics knowledge and to practise solving maths problems. I recommend trying the UKMT Senior papers for q...
JG
2999 Views