Find the equation of the line which passes through (−5, 2) and the point of intersection of the lines x + 3y=0 and 4x − 4y −13=0.

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Answer:

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An equation is formed when two equal expressions. The equation of the line passing through the intersection and the point (-5,2) is y=(-0.3781)x+ 0.1092.

What is the equation of a line?

A line is a one-dimensional shape that is straight, has no thickness, and extends in both directions indefinitely. The equation of a line is given by,

y =mx + c

where,

x is the coordinate of the x-axis,

y is the coordinate of the y-axis,

m is the slope of the line, and

c is the y-intercept.

Given the two equations x + 3y=0 and 4x − 4y −13=0. The intersection of the equation can be found as,

Solve the first equation for x,

x+ 3y = 0

x = -3y

Solve the second equation, by substituting,

4x − 4y −13=0

4(-3y) − 4y −13=0

-12y - 4y -13 = 0

-16y = 13

y = 13/(-16)

y = -0.8125

Substitute the value of x,

x = -3y

x = -3(-13/16)

x = 39/16

x = 2.4375

Hence, the coordinate of the point of intersection is (2.4375, -0.8125).

Now, the slope of the line passing through the intersection and the point (-5,2) is,

Slope, m = (2 + 0.8125)/(-5-2.4375)

              = -2.8125/7.4375

              = -0.3781

Substitute the slope and the coordinate in the equation of the line,

y = mx + c

2 = (-0.3781)(-5) + c

2 - 1.89 = c

c = 0.1092

Hence, the equation of the line passing through the intersection and the point (-5,2) is y=(-0.3781)x+ 0.1092.

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