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Solve the following simulateous equations: 3x+y=11 and 2x+y=8

Minus 2x+y=8 from 3x+y=11 so that the y's cancel out (y-y=0). Then we get the equation 3x-2x=11-8.So we get x=3.We can substitute this value back into one the orginal equations: y=11-3(3)=2 - so y=2.We can c...
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Answered by Cameron G. • Maths tutor
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Find the coordinates of the point of intersection of the lines y = 3x - 2 and x + 3y = 1.

(A-level Maths) Simultaneous equations: 1) y = 3x -2 2) x + 3y = 1 Substitute y = 3x - 2 into equation 2: x + 3y = 1x + 3(3x-2) = 1 1 mark x + 9x - 6 = 1 Expand brackets 10x - 6 = 1 Solve equation 10x = 1 + ...
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Answered by Kiran B. • Maths tutor
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Use Extract D to identify two significant points of comparison between the balance of trade in goods and the balance of trade in services over the period shown.

Comparison one: the balance of trade in goods peaked in 2010 Q4 at -£10.4 million, whereas the balance of trade in services peaked in 2011 Q2 at £5.6 million.Comparison two: the balance of trade in goods had...
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Answered by Jacob S. • Economics tutor
3658 Views

Explain the key characteristics of a monopoly.

Firstly, monopolists aim for profit maximisation. This is achieved by operating at an output level where marginal cost equals marginal revenue (MC=MR). However, contrary to other market structures, there are...
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Answered by James G. • Economics tutor
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How and when is the subjunctive tense used?

The subjunctive, which is technically a 'mood', is a grammatical aspect that everyone struggles with (even students at university!), however after a little practice it is fairly easy to master.Firstly, the s...
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Answered by Isabelle R. • Spanish tutor
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