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Given that 2log2(x+15) -log2(x) = 6, show that x^2-34x+225=0

As we know nlog(a) is the same as log(a)^n, we can rearrange the equation to log2(x+15)^2 -log2(x) = 6. Also, we know that log(a) - log(b) is equal to log(a/b), so we can fu...

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Answered by Rafey A. Maths tutor
12949 Views

1a) Describe the difference between strong and weak acids. 1b) HCl is a strong acid. Draw the spin diagram for a chlorine atom.

1a) Strong acids fully dissociate in water, whereas weak acids only partially dissociate in water - thus forming an equilibrium mixture.
1b) See diagram.

Answered by Chemistry tutor
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In a village the number of houses and the number of flats are in the ratio 7 : 4 the number of flats and the number of bungalows are in the ratio 8 : 5 There are 50 bungalows in the village. How many houses are there in the village?

first combine into one ratio by finding lowest common multiple between common category so houses:flats:bungalow = 14:8:5. then for every 5 bungalows to every 14 houses so 50/5 = 10 and 10 x 14 = 140. so t...

Answered by Maths tutor
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Explore the ways in which the writer of the great Gatsby presents corruption

First of all I would begin by writing a mind map detailing any thing about corruption in the novel: quotes, characters, literary techniques etc to get all ideas down.
Continuing on I would advise the...

Answered by English tutor
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Outline two cultural factors that may affect ethnic differences in educational achievement. (4 marks)

Remember this is a four mark question, which means two factors (one mark each) and one explanation for each one. Many answers will be accepted.1 - language. Some pupils may speak a different language at h...

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