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When composing a mechanism in organic chemistry, how do I use curly arrows?

There are a few things to learn about the use of curly arrows. Once you've grasped the basics, though, you'll be able to use them with simplicity and clarity no matter how complicated the mechanism is! The f...
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Answered by Marc L. • Chemistry tutor
5082 Views

How do i solve a system of 2 equations?

This problem is one that can be confusing if not tackled orderly. Let us have an example of a system of 2 equation: 3x + 5y = 13 4x + 7y = 18 First we must choose one of the two and then express one of our v...
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Answered by Ioan I. • Maths tutor
5369 Views

How do I solve this problem?

Two trains move towards one another. The first one has a speed of 30 km/h , and the second one travels at 50 km/h . The initial distance between them is 160 km and they both begin to move at the same time. A...
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Answered by Ioan I. • Physics tutor
3848 Views

How can i learn all the specific vocabulary that is needed for the best marks?

A great tip for learning vocabulary is first of all, try to start learning as soon as possible and by learning a handful of words, or even just one word, every day will be a lot easier than attempting to lea...
JP
Answered by Jacob P. • Spanish tutor
3170 Views

Bag A contains £7.20 in 20p coins. Bag B contains only 5p coins. The number of coins in bag B is three-quarters of the number of coins in bag A. How much money is in bag B?

First you want to find out how many coins there are in bag A. So how many 20p coins do you need to make £7.20? This is the same as 720p. 720 divided by 20 is the same as 72 divided by 2 which is 36. So there...
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Answered by Anezka E. • Maths tutor
12987 Views