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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...
TA
Answered by Thomas A. • Maths tutor
3992 Views

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...
AT
Answered by Arron T. • Economics tutor
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How do researchers know which research method to use for their study?

The decision to use one of these over another depends mostly on what exactly the researchers are trying to find or understand, that is the aim of the study. as each has different strengths and limitations. A...
ME
2706 Views

expand (2x+4)(x+2)

For this question you can use a method called the foil method. The F stands for first therefore you times the 2 variables that are first in each bracket. 2x times x which gives you 2x^2. The O stands for out...
AF
Answered by Aiyshah F. • Maths tutor
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A ladder of length 3.5m rests against a vertical wall and makes an angle of 40* with the floor. How far up the wall does top of the ladder reach?

We can use trigonometry to answer this question using the following steps: Sketch the question out Label the right angled triangle correctly (using information in the question)Identify the correct equation f...
HW
Answered by Helena W. • Maths tutor
4995 Views