standards: mathematical problem solving and communication: 2.5.8.a, 2.5.8.b, 2.5.8.c algebra and...
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Introduction s&category_id=316 s&category_id=316TRANSCRIPT
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Standards:Mathematical Problem Solving and
Communication:2.5.8.A, 2.5.8.B, 2.5.8.C
Algebra and Functions2.8.8.D, 2.8.8.E
Objectives:use rates and ratios to solve real life problems
use percents to solve and model real life problems
Miss ZeugginSeptember 24th 2008
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Chapter 3 Section 8
Rates/Ratios/Percentages
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Introductionhttp://www.grocerygogo.com/index.php?tar
get=categories&category_id=316
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RatesIf a and b are two measurable quantities,
then the rate of a per b is
Example: miles and hours: miles per hour (mph)
ba
hm
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Example of RatesYou drove 152 miles and it took you 2.5
hours to get there. How many miles per hour where you driving?
You spend about $150 dollars a week. About how much per day do you spend?
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Using Ratios -comparison of two numbers using division
• Suppose you got a 37/42 on a test and the teacher told you that the grade going into the grade book was going to be out of 100. How would you solve this?
• You want to leave a 15% tip on your dinner from TGIFridays that cost you $80.00. How much of a tip do you need to leave?
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Percentages200 people were asked
what game system the liked to play the most:
What percentage of people like to play Wii?
XBOX?
PS3?
Wii126
people
PS322
people
XBOX 36052 people
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Class WorkPage 183 #3,7,8,9,11,12,15,16,17
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Review for TestJEOPARDY!!!
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HomeworkPage 190
1-7,9-14,16-20,22,32