Top answers

What are emergent properties?

Multicellular organisms show emergent properties; these are properties that exist due to many different components working together. For example, your lungs work and help you breathe due to all of the cells ...
HA
Answered by Helen A. • Biology tutor
24118 Views

How do we form the present tense endings for regular 'er', 'ar' and 'ir' verbs?

The present tense is used to describe actions that are happening in the present, and is the most commonly used tense in Spanish To form it, first you must remove the infinitive endings of the verb - er, ar a...
CA
Answered by Charlie A. • Spanish tutor
3769 Views

When do you use the Past Perfect (das Plusquamperfekt) and how to you construct it?

The Past Perfect is used to describe events that happened before another event in the past. It is constructed like the present perfect tense, except that "haben" or "sein" is in its simpl...
MS
Answered by Marie S. • German tutor
3458 Views

Differentiate y^3 + 3y^2 + 5

When you differentiate, you multiply by the old power and decrease the power by 1. If the expression has a constant in it, this differentiates to 0. So the answer is 3y^(3-1) + (3x2)y^(2-1) + 0 = 3y^2 +6y
CH
Answered by Chloe H. • Maths tutor
4756 Views

Factorise x^2 + 3x +2

You want two numbers that multiply to give 2 and add to give 3. Looking at factors is always easiest, so start by listing pairs of numbers that multiply together to give 2. There are only two such pairs, 1x2...
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Answered by Chloe H. • Maths tutor
6224 Views