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The line l is a tangent to the circle x^2 + y^2 = 40 at the point A. A is the point (2,6). The line l crosses the x-axis at the point P. Work out the area of the triangle OAP.

Firstly to work out the area of the triangle OAP we need to know the coordinates of the individual points O, A and P. O is the centre of the axis hence has coordinates (0,0). The coordinates of the point A h...
MQ
Answered by Mohammad Q. • Maths tutor
8046 Views

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
6170 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
8017 Views

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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