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9 answers

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 · answer #1 · answered by Anonymous · 0 0

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 · answer #2 · answered by Subhash G 2 · 0 0

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 · answer #3 · answered by K N Swamy 3 · 0 0

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 · answer #4 · answered by Rose 2 · 0 0

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 · answer #5 · answered by Pretty Q. 1 · 0 0

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 · answer #6 · answered by Sleeping Beauty 2 · 0 0

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 · answer #7 · answered by Sherman81 6 · 0 0

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 · answer #8 · answered by Jordi 2 · 0 0

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 · answer #9 · answered by James_Stormwind 3 · 0 0

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