DrDelMath

Elementary Algebra at Meramec

SUMMARY
Chapter 2:  Equations, Inequalitites, and Problem Solving

Section 2.1: Solving Equations

Goals-- What You Should Learn

1. Goal One
2. Goal Two
3. Goal Three

Links to Supplemental Material
Always Check the List of OnLine Drill and Practice

 











Some fundamental properties of equality of real numbers will help us to solve equations.









These fundamental properties of equality of real numbers are the basis for the following two properties of equations.





Section 2.2: Problem Solving

 

Links to Supplemental Material
Always Check the List of OnLine Drill and Practice

Worked Percent Examples
Worked Mixture Examples
Miscellaneous Word Problems

Goals-- What You Should Learn

1. Goal One
2. Goal Two
3. Goal Three







Percent

All percent problems are solved by referring to the basic formula that relates percentage, percent, and the base of the percentage.

    Percentage = (Percent)(Base)

There are only three percent related problems:
    (1) Given Percent and Base, calculate Percentage
   (2) Given Percent and Percentage, calculate Base
   (3) Given Percentage and Base, calculate Percent

If we let A represent Percentage, let P represent percent and B represent the Base, the the basic formula may be written as
            A = PB
which is read as follows:
   The percentage A is P percent of the base B.

Use this verbal statement and the basic formula to help translate percent problems into an equation.

Finally remember the meaning of percent is "per 100" and convert all percents to decimals.

Section 2.3: Simplifying Algebraic Expressions

Goals-- What You Should Learn

1. Goal One
2. Goal Two
3. Goal Three

Links to Supplemental Material
Always Check the List of OnLine Drill and Practice

 

















Section 2.4: More About Solving Equations

Goals-- What You Should Learn

1. Goal One
2. Goal Two
3. Goal Three

Links to Supplemental Material
Always Check the List of OnLine Drill and Practice

 

Section 2.5: Formulas

Goals-- What You Should Learn

1. Goal One
2. Goal Two
3. Goal Three

Links to Supplemental Material
Always Check the List of OnLine Drill and Practice

1. A Collection of Useful Formulas


Study the formulas presented on the Formula page of Special Topics. A link is provide under Supplemental Material.

Section 2.6: More About Problem Solving

Goals-- What You Should Learn

1. Goal One
2. Goal Two
3. Goal Three

Links to Supplemental Material
Always Check the List of OnLine Drill and Practice

 

 

Section 2.7: Solving Inequalities

Goals-- What You Should Learn

1. Goal One
2. Goal Two
3. Goal Three

Links to Supplemental Material
Always Check the List of OnLine Drill and Practice