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How do I remember all the formulas I will need for questions.

It is difficult to remember formulas, especially when they are similar and easy to confuse. Some methods of remembering the many formulas needed for physics and maths are to recite them, to do a lot of pract...
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Answered by Elizabeth S. • Physics tutor
2709 Views

I want to buy 1 litre of milk. My options are to either buy 250ml bottles for £1 each or 500ml bottles for £1.50 each. Which is the cheapest way for me to buy 1 litre of milk?

If you were to buy 250ml bottles you would need four meaning - 250 x 4 = £1 x 4 = £4. If you were to buy 500ml bottles you would need two meaning - 500 x 2 = £1.50 x 2 = £3. Therefore it is cheaper to buy tw...
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Answered by Emily M. • Maths tutor
4033 Views

Fully expand (2x+4)(4x-3).

Answer: 8x 2 +10x-12 Explanation: It is really important that every 'term' is multiplied by every other 'term'. A 'term' doens't just refer to the number but also to the sign in front of it i.e. the terms in...
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Answered by Matilda H. • Maths tutor
4270 Views

When do you use the compound past or the imperfect tense in French?

The compound past is used for actions that are completed and have no further relevance at present. For example, " J’ai fini mes devoirs." On the other hand, the imperfect tense is used for ongoing ...
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Answered by Louise B. • French tutor
2417 Views

Give the importance of the lock and key model of an enzyme

The lock and key model only allows one type of specific substrate to form a substrate-activesite complex with each specific type of enzyme. This is due to their complementary shapes, as only one shape and he...
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Answered by Paula F. • Biology tutor
10810 Views