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Andrej [43]
3 years ago
5

Solve y= x -3 and 2y = 3x -8

Mathematics
2 answers:
ch4aika [34]3 years ago
5 0
Y = x -3 
2y = 3x - 8

2(x - 3) = 3x - 8
2x - 6 = 3x -8
-2x       -2x

-6 = x - 8
+8     +8

2 = x

to find y you plug x in an equation

y= x - 3 
y = 2 - 3
y = -1
MAXImum [283]3 years ago
5 0
Y=x-3
2y=3x-8
plug in y
2 (x-3)=3x-8
simplify
2x-6=3x-8
+8 both sides
2x+2=3x
-2x both sides
2=x
plug in to solve for y
y=2-3
y=-1
check if correct
2 (-1)=3 (2)-8
-2=6-8
-2=-2

true

x=2
y=-1
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AD that is the answer
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2 years ago
Write the slope intercept form of a line through (6, -7) and parallel to y= x - 9
AveGali [126]

Answer:

y = x - 13

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = x - 9 ← is in slope- intercept form

with slope m = 1

Parallel lines have equal slopes, thus

y = x + c ← is the partial equation of the parallel line

To find c substitute (6, - 7) into the partial equation

- 7 = 6 + c ⇒ c = - 7 - 6 = - 13

y = x - 13 ← equation of parallel line

7 0
4 years ago
Help!!! Quick!!! Plzzzzz!!!
max2010maxim [7]

Answer:

x = -8

y = 9

Step-by-step explanation:

to solve this expression using simultaneous equation, we would say let

y =9............................................. equation 1

 6x + 5y =-3............................................equation 2

substitute equation 1 into equation 2

-3 = 6x + 5y............................................equation 2

6x + 5(9) = -3

6x + 45 = -3

collect the like terms

6x = -3-45

6x = -48

divide both sides by the coefficient of x which is 6

6x/6 = -48/6

x = -8

therefore y = 9

x = -8

4 0
4 years ago
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Anastaziya [24]

Answer: D

Step-by-step explanation:

The key to finding the line perpendicular to the one given is teh slope. The slope is the opposite reciprocal of the original line.

m=3

perpendicular m=-1/3

Now that we know the slope, we can see which of our answer choices have -1/3 as the slope. We can see D is the only option that has -1/3 for slope.

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4 years ago
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Step-by-step explanation:

($690) X 2 X 1.25 = $1725.

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