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solve the simultaneous equations 8x + 2y = 48 , 14x + 6y = 94

Step 1) Rearrange the first equation to make y the subject: 8x + 2y = 48 , 2y = 48 - 8x , y = 24 - 4x. step 2) Sub y = 23 - 4x into the second equation: 14x + 6(24 -4x) = 94 , 14x + 144 - 24x = 94 Step 3) so...
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Answered by Harrison S. • Maths tutor
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How accurate is it to say that Stalin’s use of terror in the 1930s was fundamentally similar to Lenin’s use of terror in the years 1918–24?

Whilst many historians would argue that Lenin and Stalin's use of terror was markedly different in their respective presidencies, Lenin established the apparatus which enabled Stalin to enforce his political...
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Answered by Anna V. • History tutor
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The second and fourth term of a geometric series is 100 and 225 respectively. Find the common ratio and first term of the series. Round your answer to 2 d.p if necessary

Formula for a Geometric series for term n = ar n , where a = the first term and r = common ratio.Therefore, with the information given we can write that ar 2 = 100 and ar 4 = 225 , where a and r are the cons...
Answered by • Maths tutor
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What are the differences between animal and plant cells?

Animal and plant cells are very similar as they both have a cell membrane, a cytoplasm and a nucleus.However, plant cells also have a permanent vacuole, chloroplasts and a cell wall.
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Answered by Isobel H. • Biology tutor
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What is osmosis?

To understand osmosis, first you need to understand water potential. Pure water has a water potential of 0, and as it becomes less pure (due to things dissolving in the water) the water potential goes down i...
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