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Expand the following : (2x+3)(x-1)

We multiply the 2x in the first bracket by everything in the second bracket to give: 2x²-2xWe then multiply the 3 in the first bracket by everything in the second bracket to give: 3x-3Putting 2...

Answered by Samuel S. • Maths tutor

2852 Views

Describe and explain how the typical mammalian eye provides a detailed colour image of close-up objects in high light intensities.

I would firstly begin with looking at the key words in the question such as "describe" and "explain": whilst trying to focus on those words during the entirety of the answer. This ques...

Answered by Lucy G. • Biology tutor

4221 Views

In a titration, 45.0 cm^(3) of 0.100 mol dm^(-3) sodium hydroxide solution is exactly neutralised by 40.0 cm^(3) of a dilute hydrochloric acid solution. Calculate the concentration of the hydrochloric acid solution in mol dm^(-3).

First of all, summarise everything that you know in a table or in brief notes:NaOH, 45 cm^(3), 0.1 mol dm^(-3)HCl, 40 cm^(3)The first thing that you need to do is to find the number of moles of NaOH. This...

Answered by Lauren J. • Chemistry tutor

4812 Views

Explain the differences between neuronal and hormonal communication and give an example of each.

Neuronal signals are often transmitted over a relatively short distance and over a short period of time. Due to pathways of neurons these signals can be incredibly specific, coming from one stimulus and b...

Answered by Peter D. • Biology tutor

7397 Views