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Solve the simultaneous equations: 2x-y=x+4; x^2+4y^2=37

taking equation 1 and solving for x: 2x-y=x+4 x-y=4 x=y+4 Sub our new equation into equation 2 from the question: (y+4) 2 +4y 2 =37 Expand and simplify: y 2 +8y+16+4y 2 =37 5y 2 +8y-21=0 Factorise: (5y-7)(y+...
AW
Answered by Alexander W. • Maths tutor
6217 Views

How can I write a good essay?

In order to write a good, accurate and developped essay in French you first need to begin by fully understanding the question. A lot of people tend to skim read the question, getting a gist of what it is ask...
WJ
Answered by William J. • French tutor
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A line passes through coordinates (-2,4) and (8,9). Does the point with coordinates (32,55) fall on this line?

To work out if a given point with coordinates (X,Y) falls on a line you must work out the equation for the line. All straight lines follow the formula: y=mx+c with 'y' being the Y coordinate, 'x' being the X...
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Answered by Nicholas S. • Maths tutor
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Find x: 4x + 7 = 27

4x + 7 = 27 4x = 20 x = 5
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Answered by Saskia P. • Maths tutor
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When should you use the preterite tense and when should you use the imperfect tense in Spanish

Both the preterite and imperfect tenses are past tenses in Spanish but they are used in separate ways. Imperfect Tense Habitual actions "ing" e.g I was walking what you were doing when interrupted ...
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Answered by Eleanor R. • Spanish tutor
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