3. 3. Determining Equivalence.notebook February 06, 2013
Happy Wednesday!
Today's warmup is Mental Math #15.
When you are finished, please take out your homework
and a red pen.
Solve each equation or inequality for the variable:
1) 2x + 2 > 4
2) 2(x + 2) 3x > 2
3) 5(x 3) + 4 =
4) 3(c+4) 2 > 7
5) 9 = 8 + [ 3 (2x + 4)] 6x
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5. 3. Determining Equivalence.notebook February 06, 2013
While I check in your work, please continue
working on the following ACE problems:
Page 15: 1012
Page 16: 1823, 2532, 4649
Label the paper you use with your name,
date, and "Classwork" and title it
"Equivalent Expressions". You may use the
same paper as yesterday.
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14. 3. Determining Equivalence.notebook February 06, 2013
Key Question: Is plugging in one value to
both expressions good enough to determine
equivalency?
Let's try 2x + 1 and x + 2. Evaluate for x = 1.
Are the expressions equivalent?
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15. 3. Determining Equivalence.notebook February 06, 2013
Key Question: Is plugging in one value to both
expressions good enough to determine equivalency?
Let's try 2x + 1 and x + 2 again. This time
evaluate for x = 3.
Are the expressions equivalent?
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16. 3. Determining Equivalence.notebook February 06, 2013
Key Question: Is plugging in one value to both expressions
good enough to determine equivalency?
This time we'll use y = 4(x + 2) 4 and
y = 4(x + 1). Evaluate for x = 1 and x = 2
Are the expressions equivalent?
Do you need at least two values to produce
the same answer to confirm that expressions
are equivalent?
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17. 3. Determining Equivalence.notebook February 06, 2013
Why are two values for x
y = 4(x + 2) 4
good enough to determine
equivalent expressions?
y = 4(x + 1)
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20. 3. Determining Equivalence.notebook February 06, 2013
Group Work: Problem 1.4 AE
Write neatly and show your
work; this will be turned in for
credit.
No more than two people per
group.
Groups not working will be split
up and work alone.
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