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Draw the graph of the following …

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Draw the graph of the following equations - (1) 2x- 3y +6=0 (2) 2x+3y-18=0 (3) y-2=0 Find the vertices of the triangle so formed also find the area of the triangle.
  • 1 answers

Sia ? 6 years, 7 months ago

{tex}2x - 3y + 6 = 0{/tex}
{tex}\Rightarrow y = \frac { 2 x + 6 } { 3 }{/tex}

x -3 0
y 0 2

{tex}2x + 3y - 18 = 0{/tex}
{tex}\Rightarrow y = \frac { 18 - 2x } { 3 }{/tex}

x 0 3
y 6 4


Thus, the two graph lines intersect at (3, 4)
{tex}\therefore{/tex}  x = 3 and y = 4 is the solution of given system of equations
The vertices of the triangle formed by these lines and y - axis are (3, 4), (0, 6) and (0, 2)
So, height of the triangle
= distance from (3, 4) to y-axis
= 3 units
Base = 4 units
Area of the triangle = {tex}\frac { 1 } { 2 } \times \text { base } \times \text{height}{/tex}
{tex}= \frac { 1 } { 2 } \times 4 \times 3{/tex}
= 6 sq. units

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