Solve System by Substitution

Flashcard
•
Mathematics
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a system of equations?
Back
A set of two or more equations with the same variables that are solved together.
2.
FLASHCARD QUESTION
Front
What does it mean to solve a system by substitution?
Back
To solve one equation for one variable and substitute that expression into the other equation.
3.
FLASHCARD QUESTION
Front
What is the first step in solving a system of equations by substitution?
Back
Isolate one variable in one of the equations.
4.
FLASHCARD QUESTION
Front
If y = 2x + 3, what is y when x = 4?
Back
y = 2(4) + 3 = 11.
5.
FLASHCARD QUESTION
Front
What is the solution to the system: y = x + 2 and y = 3x - 4?
Back
(2, 4).
6.
FLASHCARD QUESTION
Front
How do you check if a solution is correct for a system of equations?
Back
Substitute the solution back into both original equations to see if they hold true.
7.
FLASHCARD QUESTION
Front
What does it mean if a system of equations has no solution?
Back
The lines represented by the equations are parallel and never intersect.
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