Checking Boundary Values
Pre-Algebra · Flashcards
PRE-ALGEBRA · FLASHCARDS
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QUESTION
What does a closed circle at an endpoint on a number line show?
QUESTION
The boundary of
x
−
4
<
2
x - 4 < 2
x
−
4
<
2
is
x
=
6
x = 6
x
=
6
. What does substituting 6 show?
QUESTION
What is the boundary value of the inequality
3
x
−
6
>
9
3x - 6 > 9
3
x
−
6
>
9
?
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ANSWER
x
=
5
x = 5
x
=
5
. Solving the related equation
3
x
−
6
=
9
3x - 6 = 9
3
x
−
6
=
9
gives the boundary.
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