Equation with Rational Expressions: Practice Problem
A problem to practice solving a equations with a rational expression.
Equation with No Solution, An
An equation with binomials in the denominators is solved. When the solution is checked, we find that it is not an allowable solution.
Percent in Word Problems: Practical Problems Involving Percent and Proportion
This clip establishes that percent means comparing something to 100, then presents a number of practical problems about percentage that are solved by setting up proportions and cross-multiplying.
Percent in Word Problems: Summary: Percent in Word Problems
This clip summarizes the material presented in the lesson on percent in word problems. It touches on several of the key terms and concepts, including proportions and cross-multiplying. It also mentions some of the special words that come up in busin...
Percent in Word Problems: Reviewing Proportion
This clip reiterates that proportion is the key idea in all work with percent. The clip notes that while there may be quicker ways to handle a percent problem, we can always get started with this type of problem by setting up a proportion because, "...
Example of Multiplying Both Equations
There is always more than one way to solve a system of equations with the elimination method. This example includes tips for deciding which term to eliminate.
Example of Solving Systems with Fractions
Solving another system of equations using multiplication and the least common denominator to find the solution.
Factor: x2 5x - 24
A quadratic trinomial in which the last term is negative is factored.
Factor: a2 - ac - ab bc
When grouping terms, the goal is to end up with an expression that is equal to the original polynomial. Close attention to the signs is necessary to ensure a correct outcome. Remember that a minus sign in front of parentheses is the same as subtract...
Variables and the Greatest Common Factor
To factor completely, the greatest common factor must include every number and variable that is a factor of each term in the polynomial. A demonstration of how variables can be a part of the greatest common factor.