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Evaluate 5/(x−1)+2/(x+4)

we need to have a common denominator (bottom number the same) to be able to add or subtract fractionsmultiply first fraction by (x+4) on numerator (top) and denominator (bottom)multiply second fraction by (x...
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Answered by Claire W. • Maths tutor
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Describe 2 ways the body prevents the entry of microorganisms.

• acid in stomach kills pathogens in food• skin forms a barrier / produces antimicrobial secretions• hairs in the nose trap (particles which may contain) pathogens• trachea / bronchi has mucus which traps pa...
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Answered by Fiona C. • Biology tutor
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Discuss one strength and one weakness of the biological approach to psychology

One strength of the biological approach is that it is a very scientific approach. The biological area often uses measurable and objective measures such as experiments and scanning techniques. For example, Sp...
Answered by • Psychology tutor
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How would you approach a problem question on murder?

Definition of murder: Murder is defined as the unlawful killing of a person in being under the Queen's peace with malice aforethought . Steps: Establish the actus reus: Unlawful killing of a person in being ...
Answered by • Law tutor
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What is the difference between act and rule utilitarianism?

The fundamental difference between act and rule utilitarian theories is that they have different criteria of right action and therefore prescribe different moral actions in different situations. A criterion ...
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Answered by Luke M. • Philosophy tutor
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