Top answers

How and when do you use the pluperfect subjunctive?

The Pluperfect Subjunctive is used to indicate an action that happened prior to another in the past where the subjunctive is required. It is important to remember the acronym used for situations where the su...
GM
Answered by Georgia M. • Spanish tutor
7681 Views

How do I work out (2+y)^4 using the binomial expansion?

We're going to use the binomial expansion formula, which is a lot easier to remember than it looks: (a+b) n =C 0 *a n *b 0 + C 1 *a (n-1) *b 1 + C 2 *a (n-2) *b 2 +....+ C n *a 0 b n Now let's apply this for...
AB
Answered by Andrew B. • Maths tutor
4145 Views

When do you use the past tenses 'passé composé', 'plus-que-parfait', and 'imparfait'?

The 'passé composé' - formed by the auxiliary 'avoir' or 'etre' conjugated in the present tense, followed by the past participle of the verb being conjugated - is used the most when speaking. It generally re...
TS
Answered by Tamina S. • French tutor
21002 Views

What are the structural and functional differences between arteries and veins?

Arteries have a much thicker muscular layer than veins, as this allows them to contract strongly and generate a high pressure to allow blood to be quickly transported to tissues in the body. Arteries also ha...
AR
Answered by Anita R. • Biology tutor
3509 Views

How does an action potential work?

Resting potential at - 75mV Stimulus causes opening of sodium channels and influx of sodium ions, membrane becomes less polarized Threshold potential reached at -55mV, opening of many more sodium channels, g...
CH
Answered by Catherine H. • Biology tutor
3524 Views