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If 5x + 3y = 27 and 6x - 2y = 10, find x and y

5x + 3y = 27 (1)6x - 2y = 10 (2)Rearrange (1) to make x the subject.Subtracting - 3y from both sides gives5x = 27 - 3yDivide both sides by 5 givesx = (27 - 3y)/5Substitute (1) into (2) gives6(27 - 3y)/5 - 2y...
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Answered by Thomas A. • Maths tutor
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What is the balance of payments?

Current accountThe balance of payments plus net investment incomes from overseas assets and net transfersBalance of trade in goods: the difference between imports and exports of goods in the primary and seco...
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Answered by Arron T. • Economics tutor
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How do I plot a graph of y=x^3-9x?

To begin with we see that y=x 3 -9x is a positive cubic function, and therefore we know its general shape.The first step is to find the x interecepts. We do this by setting y=0 and solving the resulting equa...
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Answered by Tutor127548 D. • Maths tutor
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What is meant by a factor of globalisation?

Globalisation factors refer to the elements that drive globalisation and cause globalisation to occur.Before understanding the factors of globalisation we must first understand the meaning of globalisation i...
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Answered by Hannah D. • Geography tutor
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Why cant I use the same expression for doppler effect when the source is in motion and when the listener is in motion?

This is a common misconception that involves changes in frames of reference. In most contexts moving towards an object refers to the same physical reality as the object moving towards you (at constant speed)...
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Answered by Francisco M. • Physics tutor
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