13 solving equations -...
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Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 101:39 PM
13 Solving Equations
Daily Outcomes:I can translate verbal expressions into algebraic expressions
and equations, and vice versaI can solve equations using the properties of equality
What does the variable m represent?
Is the length of a kilometer greater than or less than the length of a mile?
About how many kilometers are in 12 miles?
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Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Aug 119:44 AM
Jul 101:41 PM
Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Aug 211:42 AM
Example 1: Write an algebraic expression to represent each verbal expression (Écris une expression algébrique pour représenter chaque expression verbale).
1. 7 less than a number
2. the square of a number decreased by the product of 5 and the number
3. the cube of a number increased by 4 times the same number
4. three times the difference of a number and 8
Jul 101:43 PM
Open sentence: a mathematical sentence containing one or more variables (une phrase mathématique contenant une ou plusieurs variables)
Equation: a mathematical sentence stating that two mathematical expressions are equal (une phrase mathématique indiquant que deux expressions mathématiques sont égales)
Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 101:45 PM
Example 2: Write a verbal sentence to represent each equation. (Écrivez une phrase verbale pour représenter chaque équation)
5. 6 = 5 + x
6. 7y 2 = 19
7. g 5 = 2
8. 2c = c2 4
Jul 101:51 PM
Solution: a replacement that makes an open sentence true (open sentences are neither true or false until the variables are replaced by numbers) (un remplacement qui fait une peine ouverte vrai ( phrases ouvertes ne sont ni vrais ou faux jusqu'à ce que les variables sont remplacées par des numéros ))
Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 101:53 PM
Jul 101:53 PM
Example 3: Name the property illustrated by each statement. (Nom de la propriété illustrée par chaque instruction)
9. a 2.03 = a 2.03
10. If 9 = x, then x = 9
11. If 11a + 2 = 3a, then 3a = 11a + 2
Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 101:54 PM
Jul 125:23 AM
Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 101:55 PM
Example 4: Solve each equation. Check your solution.
12. m 5.48 = 0.02 13. 18 = 1/2 t
14. x 14.29 = 25 15. 2/3 y = 18
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Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 101:56 PM
Example 5: (Multistep equations) Solve each equation.
16. 53 = 3(y 2) 2(3y 1) 17. 10x + 3(4x 2) = 6
18. 2(2x 1) 4(3x + 1) = 2
Jul 101:58 PM
Solving equations for a certain variable.
Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 102:41 PM
Example 6:
19. The formula for the surface area S of a cone is S = πrl + πr2, where l is the slant height of the cone and r is the radius of the base. Solve the formula for l.
20. The formula for the surface area S of a cylinder is S = 2πr2 + 2πrh, where r is the radius of the base and h is the height of the cylinder. Solve the formula for h.
Aug 1210:10 AM
Algebra II 13 Lesson with notes 3rd.notebook
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August 12, 2016
Jul 102:44 PM
Jul 102:44 PM
Example 7:
21. If 4g + 5 = 4/9, what is the value of 4g 2?
22. If 5y + 2 = 8/3, what is the value of 5y 6?