MondayTuesdayWednesdayThursdayFriday 10 Unit 3B Testing 11 Unit 3B Testing 12 Review Unit 1 13...
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Transcript of MondayTuesdayWednesdayThursdayFriday 10 Unit 3B Testing 11 Unit 3B Testing 12 Review Unit 1 13...
![Page 1: MondayTuesdayWednesdayThursdayFriday 10 Unit 3B Testing 11 Unit 3B Testing 12 Review Unit 1 13 Review Unit 2 14 Review Unit 3A & 3B 17 Support Midterm.](https://reader036.fdocuments.in/reader036/viewer/2022082407/5697bf8a1a28abf838c8a857/html5/thumbnails/1.jpg)
Monday Tuesday Wednesday Thursday Friday
10
Unit 3B Testing
11
Unit 3B Testing
12
Review Unit 1
13
Review Unit 2
14
Review Unit 3A & 3B
17
Support Midterm
18
Test Corrections
19
Final Exams
1st & 2nd
20
Final Exams
3rd & 4th
NO SCHOOL
!!
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Coordinate Algebra with Support
Midterm ReviewUnit 1
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Unit 1: Relationships Among Quantities
Key Ideas Unit Conversions
Vocabulary Linear Models
Exponential Models Consecutive Integers
Averages Rectangle Problems 2 Variable Equations Solve for a Varialbe Solve Exponentials
Solve for y and Graph
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Example 1: Convert 5 miles to feet.
5miles 5280 feet1 1mile
26,400 feet
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Tip
There are situations when the units in an answer tell us if the answer is wrong.
For example, if the question called for weight and the answer is given in cubic feet, we know the answer cannot be correct.
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Vocabulary
• # of terms• Coefficients• Factors• Constant
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Example 2: 4x2 +7xy – 3 • # of terms -
• Coefficients -
• Factors -
• Constant -
3
4 , 7
4&x2 , 7&x&y
-3
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Writing Linear & Exponential Equations
• If the numbers are going up or down by a constant amount, the equation is a linear equation and should be written in the form y = mx + b.
• If the numbers are going up or down by a common multiplier (doubling, tripling, etc.), the equation is an exponential equation and should be written in the form y = a(b)x.
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Example 3:April is moving apartments. Her family needs to rent an U-Haul truck and found out they charge $19.99 for the truck and $0.20 per mile.• Write an equation to represent the
cost. y=.20x+19.99
$27.99
• How much will it cost if the family drives 40 miles?
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Example 4:The number of mosquitos triples every day, with 10 mosquitos to start.
• Write an equation to represent the situation. xy=10(3)
143,489,070 mosquitos
• How many mosquitos will there be after 15 days?
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Example 5:Find 2 consecutive integers whose sum is 225.
first: x
second: x + 1x x 1 225
x 112
112 & 113
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Example 6:Peyton wants to get an A in her Biology class this semester. Her first 4 tests were a 94, 83, 88, and 91. What does she need to make on her 5th test to get a 90% average?
94 83 889
5x91
0
94%
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Example 7:Bill is building a sand box for his son to play in. The length is 2 feet more than the width. He has 20 feet of boards. What are the dimensions of his sand box?
w w (2 w) (2 w) 20
4 ft X 6ft
length: 2+w
width: w
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Example 8: 2-Variable EquationsKyle is celebrating his birthday and his mom gave him $50 to take his friends out to celebrate. He decided he was going to buy appetizers and desserts for everyone. It cost 5 dollars per dessert and 10 dollars per appetizer. Kyle is wondering what kind of combinations he can buy for his friends.
a) Write an equation using 2 variables to represent Kyle’s purchasing decision. (Let a = number of appetizers and d = number of desserts.)
b) Use your equation to figure out how many desserts Kyle can get if he buys 4 appetizers.
c) How many appetizers can Kyle buy if he buys 6 desserts?
5a 10d 50
5 10 54 d 0 d 3
5a 10 56 0 a 2
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Example 9:
Solve for h. A h
V3
h 3V A
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Solving Exponential Equations
• If the bases are the same, you can just set the exponents equal to each other and solve the resulting linear equation.
• If the bases are not the same, you must make them the same by changing one or both of the bases.– Distribute the exponent to the given
exponent.– Then, set the exponents equal to each other
and solve.
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Example 10: Solve the exponential equation
a) b) 2 23 27x x4 8 72 2x x
4x 8 x 7
x 5
3 x 22x3 3
2x 3 x 2
x 6
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Example 11: Solve for y and graph
4 2 6 x y
y 2x 3 -6 -4 -2 2 4 6
-6
-4
-2
2
4
6
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CW/HWUnit 1 Review Sheet