Algebra I
Today we discussedWe finished our discussion about solving systems of equations and tackled some more complicated equations with rational numbers. From there we graphed systems of inequalities to determine the solution - as with all inequalities, there are many possible solutions so the key is to find where the two graphs intersect.
Sections Covered in Textbook
1) 11-5: Elimination Using Multiplication (pages 457-461)
2) 11-5: Graphing Systems of Inequalities (pages 463-467)
Video Tutorials
1) How to Solve Systems of Equations by Graphing
- http://www.virtualnerd.com/algebra-1/systems-equations-inequalities/inequalities/solving-systems-inequalities/inequality-solve-by-graphing
- https://www.khanacademy.org/math/algebra/two-variable-linear-inequalities/graphing-inequalities/v/graphing-systems-of-inequalities-2
Assignments
1) Page 460 #'s 22, 24, 31
2) Page 465 #'s 13-33 2nd Column only
**PLEASE CHECK ODD ANSWER IN BACK OF TEXTBOOK
Pre-Algebra
Today we discussedWe have finished our unit on graphing and now have moved into ratios, proportions and percents. We defined a ratio as a comparison of two numbers by division. Ratios can be expressed in three ways:
2 is to 3 or 2:3 or 2/3
A rate is defined as a ratio that compares two numbers with different measures like mile/hour.
Proportions can be formed by setting two ratios (fractions) equal to each other. If we have a missing number, we can solve by multiplying the means and extremes and solving for the variable (missing value).
Sections Covered in Textbook
1) 9-1: Ratios and Rates (pages 324-325)
2) 9-2: Proportions (pages 327-329)
Video Tutorials
1) How to solve a proportion.
http://www.virtualnerd.com/pre-algebra/ratios-proportions/proportionality/solving-proportions/proportion-cross-multiply-example
Assignments
1) Look over chapter 8 to see if you have any questions (skip section on systems of equations)
2) Page 329 #'s 26-37 all
**PLEASE CHECK ODD ANSWER IN BACK OF TEXTBOOK
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