Understanding Systems of Equations in Three Dimensions

The video tutorial explains how to solve a system of three equations with three unknowns by visualizing them as planes in 3D space. It discusses the possibility of inconsistent systems and demonstrates the elimination method to find solutions for x, y, and z. The tutorial concludes with verifying the solutions to ensure they satisfy all equations.

What do the three equations in the system represent in three-dimensional space?

• Cubes

• Points

• Lines

• Planes

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CCSS.8.EE.C.8B

What is a possible reason for a system of three equations to be inconsistent?

• All planes form a square

• All planes are perpendicular

• All planes are parallel

• All planes intersect at a single point

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CCSS.8.EE.C.8B

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What is the first step in solving the system of equations?

• Eliminate one variable at a time

• Eliminate all variables at once

• Add all equations together

• Multiply all equations by a constant

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CCSS.8.EE.C.8B

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Which variable is eliminated first in the solution process?

• x

• y

• z

• None

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

After eliminating one variable, what type of system is obtained?

• No equations

• A single equation with one unknown

• A system of two equations with two unknowns

• A system of three equations with three unknowns

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CCSS.7.EE.B.4A

What is the value of x found in the solution?

• -3

• 3

• -2

• 2

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CCSS.7.EE.B.4A

What is the value of z found in the solution?

• 3

• -1

• 1

• -3

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CCSS.8.EE.C.8B

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What is the value of y found in the solution?

• -2

• 1

• -1

• 2

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Why is it important to verify the solution by substituting back into the original equations?

• To eliminate variables again

• To change the equations

• To find new solutions

• To check for calculation errors

What does it mean if the solution satisfies all three original equations?

• The system is inconsistent

• The solution is incorrect

• The system has no solution

• The solution is correct