oct.14, 2014
TRANSCRIPT
October 14, 2014
Today
Warm-Up
Make-Up Tests? Test Results
Opposites/Reciprocals Class Work
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%
Warm-Up Section
of Your
Notebook, please
x = ??
Fractional Equations
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=
How long will it take Ted to drive 272 miles
if his average rate of speed is 68 mph?
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
Class Notes
Section of Your
Notebook, please
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
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
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
- 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
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 )
Class Work: Additive &
Multiplicative Inverses