Parallel lines have the same slope. So, analyze the given equation to find it's slope. Then you can use its slope in the new equation.
Write the equation in slope-intercept form: y = mx + b
where m is the slope and b is the y-intercept
3x - 5y = 10
-5y = 10 - 3x
y = (3/5)x - 2
So, slope = (3/5)
For the new line, use the point-slope formula:
y - y1 = m(x - x1) where (x1 , y1) is the given point, and m is the slope.
(x1 , y1) is given as (-3 , -6) and m = 3/5
y - (-6) = (3/5)(x - (-3))
y + 6 = (3/5)(x + 3)
y = (3/5)x + (9/5) - 6
= (3/5)x + (9/5) - (30/5)
= (3/5)x - (21/5)
5y = 3x - 21
OR
3x - 5y = 21
2006-07-28 11:00:24
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answer #1
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answered by Anonymous
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what is the equation of the line through (-3,-6) and parallel to the line 3x-5y = 10
putting 3x-5y = 10 in the form y = mx + c we get
y = (3/5)x - 2 wehre 3/5 is the slope of the line
required line passes through (-3,-6) and parallel to y = (3/5)x-2
the equation of the line is (Y+6)/(x+3) = 3/5
simpliying we get, 3x - 5y -21 = 0
2006-07-28 22:46:40
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answer #2
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answered by Subhash G 2
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The equation of a line parallel to the line 3x-5y=10 is 3x-5y=k, where k is a constant. Parallel lines differ in constant only.
Now substitute the point to find the constant k.
3(-3)-5(-6)=k
k=-9+30=21.
So, the eqn is 3x-5y=21.
Respectfully
2006-07-28 10:46:01
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answer #3
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answered by K N Swamy 3
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We can find the equation by using the formula y-y1=m(x-x1) where m represents the slope of the line 3x-5y=10, x1 the x intercept (ie.3),y1 the y intercept (ie.-5)
slope,m (of 3x-5y=10) = -coefficient of x/coefficient of y =1
when both the lines are parallel then the slope of 3x-5y=10 will be equal to the other line parallel to it. By using the formula,
y+6=1(x+3) => x-y=3
2006-07-30 03:23:04
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answer #4
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answered by Rose 2
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here's ur answer:3x-5y=10
3x-3x-5y=10-3x
0-5y=10-3x
-5y/-5=10/-5 -3x/-5
y= -2+ 3/5 x
y=3/5x -2
m=3/5=y-(-6)/x-(-3)
cross multiply
3x+9=5y+30
3x-5y=30-9
3x-5y=21===equation of the line
2006-07-28 10:53:24
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answer #5
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answered by Pretty Q. 1
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Standard form = -2/3x = y
If it crosses through (-3,-6) then the y-intercept is (0,-5)
That makes the new equation:
y = -2/3x - 5
Why?
2006-07-28 11:02:33
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answer #6
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answered by Sleeping Beauty 2
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3x - 5y = 10
-5y = -3x + 10
y = (3/5)x - 2
(-3,-6), m = (3/5)
-6 = (3/5)(-3) + b
-6 = (-9/5) + b
-30 = -9 + 5b
-21 = 5b
b = (-21/5)
y = (3/5)x - (21/5)
5y = 3x - 21
-3x + 5y = -21
ANS : -3x + 5y = -21
2006-07-28 12:48:57
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answer #7
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answered by Sherman81 6
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3x-5y = 10
=> y = (3/5)x+2
So we need c in y=(3/5)x+c
Substituting (-3,-6) we get
-6 = (3/5)(-3)+c
=>c=(9/5)-(30/5) = -21/5
Therefore the answer is: y = (3/5)x -21/5
2006-07-28 10:35:44
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answer #8
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answered by Jordi 2
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Hint: The slope-intercept form of the origional line is Y=3/5x-2. Since the desired line is paralell, you have the slope for the second line, and the point of the second line. So use the point-slope form for the second line and convert it to standard.
2006-07-28 10:28:18
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answer #9
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answered by James_Stormwind 3
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