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3 years ago

A variable needs to be eliminated to solve the system of equation below. Choose the correct first step.

Mathematics

1 answer:

prohojiy [21]3 years ago

4 0

Answer:

−

-21

Step-by-step explanation:

3x−9y=−39, 3x−6y=−21 : x=5, y=6

Steps

[ 3x−9y=−39 3x−6y=−21 ]

Show Steps

Isolate x for 3x−9y=−39: x=−13+3y

Substitute x=−13+3y

[ 3(−13+3y)−6y=−21 ]

Show Steps

Simplify

[ −39+3y=−21 ]

Show Steps

Isolate y for −39+3y=−21: y=6

For x=−13+3y

Substitute y=6

x=−13+3· 6

Simplify

x=5

The solutions to the system of equations are:

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Drag each graph to show if the system of linear equations it represents will have no solutions, one solution at (2,6), one solut

hjlf

Answer:

see the explanation

Step-by-step explanation:

Verify each case

Part 1) The graph show two identical lines, then the system has infinitely many solutions

Part 2) The graph show two perpendicular lines.

Remember that the solution of the system is the intersection point both graphs

The intersection point is (2,6)

therefore

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Part 3) The graph show two intersecting lines at (-6,-2)

Remember that the solution of the system is the intersection point both graphs

The intersection point is (-6,-2)

therefore

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3 years ago

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Advocard [28]

Answer:

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2 years ago

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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