Writing Systems of Equations

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What is a system of equations?

Back

A system of equations is a set of two or more equations with the same variables. The solution is the set of values that satisfy all equations in the system.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Front

How do you represent a word problem as a system of equations?

Back

Identify the variables, translate the relationships and conditions into equations, and ensure the equations reflect the problem's constraints.

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CCSS.HSA.CED.A.3

Front

What does it mean for two equations to be consistent?

Back

Two equations are consistent if they have at least one solution in common.

Tags

CCSS.8.EE.C.8B

Front

What does it mean for two equations to be independent?

Back

Two equations are independent if they represent different lines that intersect at exactly one point.

Tags

CCSS.8.EE.C.8A

Front

What does it mean for two equations to be dependent?

Back

Two equations are dependent if they represent the same line, meaning they have infinitely many solutions.

Tags

CCSS.8.EE.C.8B

Front

How can you solve a system of equations graphically?

Back

By graphing each equation on the same coordinate plane and identifying the point(s) where the lines intersect.

Tags

CCSS.8.EE.C.8B

Front

What is substitution in solving systems of equations?

Back

Substitution is a method where you solve one equation for one variable and then substitute that expression into the other equation.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Front

What is elimination in solving systems of equations?

Back

Elimination is a method where you add or subtract equations to eliminate one variable, making it easier to solve for the other.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Front

What is the importance of checking your solution in a system of equations?

Back

Checking your solution ensures that the values satisfy all equations in the system, confirming that the solution is correct.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Front

How do you write an equation from a word problem involving two variables?

Back

Identify the two variables, determine the relationships between them, and express these relationships as an equation.

Tags

CCSS.6.EE.C.9