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The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle

Perimeter= 72Ratios are 3:4:5In total, you can think of there being 3+4+5=12 "portions".This means that in the perimeter includes 12 portions. 72/12=6 so each portion is worth 6cm.
Now we c...

Answered by Natasha A. • Maths tutor

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Why does magnesium oxide have such a high melting point?

Metal and non metal so ionic bondingStrong electrostatic forces of attraction between the positive and negative ionsWhich require lots of energy to break

Answered by Lia H. • Chemistry tutor

5288 Views

What are the differences between the use of the preterite and imperfect tenses in Spanish?

The preterite and imperfect are both past tenses in Spanish. In general, the preterite tense is used to describe actions that took place in the past and are completed, wh...

Answered by May A. • Spanish tutor

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Expand (2x+4)(x-3)

2x^2 - 2x - 12

Answered by Amy S. • Maths tutor

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Compare anaerobic respiration in a yeast cell with anaerobic respiration in a muscle cell (3 marks)

READ the question - Anaerobic respiration in both 3 marks = give 3 differences/similaritiesyeast produces ethanol but muscles produce lactic acid (difference 1)yeast produces CO2 but muscles do not (MUST ...

Answered by Amy S. • Biology tutor

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