CCGPS Coordinate Algebra
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Transcript of CCGPS Coordinate Algebra
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Monday Tuesday Wednesday Thursday Friday
3 Benchmark – Practice Questions from Unit 1 – 3 and a chance to earn Bonus (Skills Check category)
4 Review Unit 1 and 2Relationships b/t Quantities & Equations & Inequalities
5 Review Unit 3Linear & Exponential Functions
6 Review Unit 4Describing Data
7 Review Unit 5Transformations in the Coordinate Plane
10
EOCT11
EOCTUSA Test Prep
assignment due
12Reteach Part of Unit 3 – Arithmetic & Geometric Sequences
13Reteach Part of Unit 3 – Recursive
14Reteach Part of Unit 3 – Evaluate Functions
17Reteach Part of Unit 3 – Characteristics of Functions
18Reteach Part of Unit 3 – Compare Functions
19Final Exams1st period and 2nd period
20Final Exams3rd period and 4th period
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CCGPS Coordinate Algebra
EOCT ReviewUnits 1 and 2
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Unit 1: Relationships Among Quantities
Key Ideas
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Unit Conversions• A quantity is a an exact amount or
measurement.
• A quantity can be exact or approximate depending on the level of accuracy required.
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Ex 1: Convert 5 miles to feet.
5miles 5280feet1mile
26,400feet
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Ex: 2 Convert 50 pounds to grams
50 . 4541 1 .
lbs grams
lb
22,700 grams
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Ex: 3 Convert 60 miles per hour to feet per minute.
60 1 528060min 1
miles hour feethr mile
5280min
ft
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TipThere 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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4. Review Examples• The formula for density d is d =
m/vwhere m is mass and v is volume.
If mass is measured in kilograms and volume is measured in cubic meters, what is the unit rate for density?
3kgm
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Expressions, Equations & Inequalities
• Arithmetic expressions are comprised of numbers and operation signs.
• Algebraic expressions contain one or more variables.
• The parts of expressions that are separated by addition or subtraction signs are called terms.
• The numerical factor is called the coefficient.
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Example 5: 4x2 +7xy – 3 • It has three terms: 4x2, 7xy, and 3. • For 4x2, the coefficient is 4 and the
variable factor is x. • For 7xy, the coefficient is 7 and the
variable factors are x and y. • The third term, 3, has no variables
and is called a constant.
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Example 6:The Jones family has twice as many tomato plants as pepper plants. If there are 21 plants in their garden, how many plants are pepper plants?• How should we approach the solution
to this equation?tomato plant: 2xpepper plant: x 2x x 21
x 7
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Example 7:Find 2 consecutive integers whose sum is 225. first: xsecond: x + 1 x x 1 225
x 112
112&113
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Example 8:A rectangle is 7 cm longer than it is wide. Its perimeter is at least 58 cm. What are the smallest possible dimensions for the rectangle?
4x 14 58
x 11
11 by 16
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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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Create the equation of the line for each of the following tables.
9) 10) x y0 21 62 183 54
x y0 -51 32 113 19
xy 2(3) y 8x 5
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11. Linear Word ProblemEnzo 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. Enzo is wondering what kind of combinations he can buy for his friends.
a) Write an equation using 2 variables to represent Enzo’s purchasing decision. (Let a = number of appetizers and d = number of desserts.)
b) Use your equation to figure out how many desserts Enzo can get if he buys 4 appetizers.
c) How many appetizers can Enzo buy if he buys 6 desserts?
5a 10d 50
5 4 10d 50 d 3
5a 10 6 50 a 2
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12. Exponential Word Problem:
Ryan bought a car for $20,000 that depreciates at 12% per year. His car is 6 years old. How much is it worth now?
ty P 1 r
6y 20,000 1 .12
y $9,288.08
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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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Solve the exponential equation:
13) 14) 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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Unit 2: Solving Systems of Equations
Key Ideas
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Reasoning with Equations & Inequalities
• Understanding how to solve equations
• Solve equations and inequalities in one variable
• Solve systems of equations• Represent and solve equations and
inequalities graphically.
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Important Tips• Know the properties of operations
• Be familiar with the properties of equality and inequality. (Watch out for the negative multiplier.)
• Eliminate denominators (multiply by denominators to eliminate them)
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Properties to know• Addition Property of Equality• Subtraction Property of Equality• Multiplication Property of Equality• Division Property of Equality• Reflexive Property of Equality• Symmetric Property of Equality• Transitive Property of Equality• Commutative Property of Addition and
Multiplication• Associative Property of Addition and Multiplication• Distributive Property• Identity Property of Addition and Multiplication• Multiplicative Property of Zero• Additive and Multiplicative Inverses
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Example 15Solve the equation 8(x + 2) = 2(y + 4) for y.
y 4x 4
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Example 16Karla wants to save up for a prom dress.
She figures she can save $9 each week from the money she earns babysitting.
If she plans to spend up to $150 for the dress, how many weeks will it take her to save enough money?
17weeks
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Example 17• This equation can be used to find
h, the number of hours it takes Bill and Bob to clean their rooms.
• How many hours will it take them?
15 20h h
4h h 20
h 4
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Example 18• You are selling tickets for a basketball
game. Student tickets cost $3 and general admission tickets cost $5. You sell 350 tickets and collect $1450.
• Use a system of linear equations to determine how many student tickets you sold?Student: xGeneral:y
x y 3503x 5y 1450
150 student
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Example 19You sold 52 boxes of candy for a fundraiser. The large size box sold for $3.50 each and the small size box sold for $1.75 each. If you raised $112.00, how many boxes of each size did you sell?
A. 40 large, 12 smallB. 12 large, 40 smallC. 28 large, 24 smallD. 24 large, 28 small
large : xsmall:y
x y 523.5x 1.75y 112
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Example 20You sold 61 orders of frozen pizza for a fundraiser. The large size sold for $12 each and the small size sold for $9 each. If you raised $660.00, how many of each size did you sell?
A. 24 large, 37 smallB. 27 large, 34 smallC. 34 large, 27 smallD. 37 large, 24 small
large : xsmall:y
x y 6112x 9y 660
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Example 21 Which equation corresponds to the graph shown?A. y = x + 1B. y = 2x + 1C. y = x – 2D. y = -3x – 2
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Example 22Which graph would represent a system of linear equations that has no common coordinate pairs?
A B
C D
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Ex. 23 Graph
22
y xx
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CW/HWUnit 1 & 2 Practice
Problems from the GA Study Guide