Oct.14, 2014
Transcript of Oct.14, 2014
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October 14, 2014
Today
Warm-Up
Make-Up Tests? Test Results
Opposites/Reciprocals Class Work
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Results of Literal Equation TestGrade < 50%
Grade > 80%Version 1:
20Version 2: 17Version 3: 11 Total: 48
Version 1: 03Version 2: 10Version 3: 09 Total: 22
Average Number of Class Work
Assignments Completed:2.2/6 assignments =
35%
1.6/8 assignments = 20%
Average Number of Khan Academy
Topics Completed:
Average Number of Class Work
Assignments Completed:5.1/6 assignments =
85%Average Number of Khan Academy
Topics Completed:
6.4/8 assignments = 81%
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Warm-Up Section
of Your
Notebook, please
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x = ??
Fractional Equations
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Mental Math:
Pencils Down,
Pls.
With Pencil down, think of two different ways to solve the problem. Decide which method you are going to use, then solve
with pencil in hand.
w=
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How long will it take Ted to drive 272 miles
if his average rate of speed is 68 mph?
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Travis and Bill earn the same hourly pay. One week their paychecks were equal, but Bill worked 26 hours and Travis worked 18. Travis got a $50 bonus for overall good work attendance. How much total did each person earn that week?
A. $6.25B. $94C. $162.50D. $212.50E. None of the above
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Class Notes
Section of Your
Notebook, please
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Opposites are the exact same distance from zero, but are not the same number.
• Observe the distance from -1 to 0 and from 1 to 0.
-3 -2 -1 0 1 2 3
In general, a and -a are opposites if a is a non-zero number.
• They are the same distance from zero.• Therefore, we can say that the sum of a number a, • and its opposite (-a), is always zero. -1 and 1 are• opposites as are 2 and -2.
Opposites are also known by their formal name of
Additive Inverses
Opposites
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a and -a are called additive inverses of each other because they have a sum of zero when added.
• This is useful for solving equations.
Additive Inverses
x 17 25
x 17 17 25 17
x 8
x 19 37
x 19 19 37 19
x 56
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ReciprocalsTwo numbers are called
reciprocals of one another if their product is 1.
Examples include: 2 and and 3, -4 and
Reciprocals are also known by their formal name of Multiplicative Inverses
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- 4
0𝟑𝟕
- 𝟔𝟏
Find the multiplicative inverse of the following:
- 4
0𝟑𝟕
- 𝟔𝟏
Find the Opposite & Reciprocal of the following:
- 4
0𝟑𝟕
- 𝟔𝟏
Opposites & Reciprocals
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Find :1. (The reciprocal of ) + (The opposite of ) 2. (The opposite of ) • (The reciprocal of )
Opposites & Reciprocals
3. (The opposite of ) - (The opposite & reciprocal of )
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Class Work: Additive &
Multiplicative Inverses
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