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Exand and simplify (x-2)^2

When tackling this question you cannot simply multiply what is in the bracket as this this is not fully expanded. First you must rewrite it as (x-2)(x-2). From here we can on expand the brackets by multiplyi...
JS
Answered by Joshua S. • Maths tutor
12316 Views

Describe the process of a simple reflex action (6marks)

Receptors in the skin which are sensitive to changes in pain, pressure and temperature detect a change in one of these factors. This acts as the stimulus for the reflex response. This stimulus triggers an el...
JH
Answered by Jenna H. • Biology tutor
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Describe how an electrical impulse would travel across a synapse.

An electrical impulse arrives at the synaptic knob in the pre-synaptic neuron. This causes the voltage-gated calcium ion channels to open and calcium ions will diffuse into the synaptic knob, down the concen...
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Answered by Ellie Z. • Biology tutor
4544 Views

What are the negative effects climate change is having on people and the environment?

Climate change is likely to cause multiple impacts globally on both people and the environment. One of the greatest threats posed by climate change is that of sea level rise. This means low lying countries, ...
AR
Answered by Amelia R. • Geography tutor
2939 Views

How do I write essays? Sample question: Was the Treaty of Versailles too harsh?

Knowing how to write a good essay is key to achieving higher grades. The principle point is that you must avoid simply 'telling a story' and instead, use this knowledge of events to present a set of argument...
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Answered by Jade B. • History tutor
4866 Views