Percent Of Change
View more presentations from Kathy Favazza.
Tuesday, December 15, 2009
Monday, December 14, 2009
December 14th, 2009
Percent Of Change
(absolute value of old-new)/old
The absolute value of the difference/ old- the starting number
Examples- The original price of a laptop is $699 and the salesprice is $499. What is the percent of change?
699-499=200 200/699=0.286 Percent of change- 28.6% decrease
Thursday, December 10, 2009
Wednesday, December 9, 2009
Tuesday, December 1, 2009
Absolute Value Equatioms
In class today we learned how to solve equations with and without inequalities including absolute value. Absolute value [ ] is how far a number is from zero. For example the absolute location of -73 is 73 because that is how from it is from zero.
When you want to write out an equation you would write it out like this: [x] + 11 = 20. When you solve this out you should find that x = 9 but, that is not all.
THERE ARE TWO ANSWERS TO ALL EQUATIONS WITH ABSOLUTE VALUE!
The answer of this problem could be 9 but could also be -9 because it is still 9 away from zero.
When solving an equation your first step is to clear the fractions and or decimals.
Next you have to get the absolute location by itself on one side of the inequality sign. Once you do that you can solve but , remember there is two answers to the problem. Absolute value is a grouping symbol, which is why some kids learn GEMDAS instead of PEMDAS the 'G' being grouping and the 'P' being
If the problem is [B] + 9 = 15 the answer is 6 or -6.
Absolute value cannot be negative.
Absolute location with inequalities is the next step. If the absolute value is less than or equal to it is and. If the absolute value is greater than or equal to it is or.
[L-5] >-6
[K+9]
Next you solve like a regular equation.
When you want to write out an equation you would write it out like this: [x] + 11 = 20. When you solve this out you should find that x = 9 but, that is not all.
THERE ARE TWO ANSWERS TO ALL EQUATIONS WITH ABSOLUTE VALUE!
The answer of this problem could be 9 but could also be -9 because it is still 9 away from zero.
When solving an equation your first step is to clear the fractions and or decimals.
Next you have to get the absolute location by itself on one side of the inequality sign. Once you do that you can solve but , remember there is two answers to the problem. Absolute value is a grouping symbol, which is why some kids learn GEMDAS instead of PEMDAS the 'G' being grouping and the 'P' being
If the problem is [B] + 9 = 15 the answer is 6 or -6.
Absolute value cannot be negative.
Absolute location with inequalities is the next step. If the absolute value is less than or equal to it is and. If the absolute value is greater than or equal to it is or.
[L-5] >-6
[K+9]
Next you solve like a regular equation.
Absolute Value Equations & Inequalities
Here are our notes on how to solve Absolute Value equations and Inequalities.
Absolute Value Equations & Inequalities
View more presentations from Kathy Favazza.
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