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Khan Academy
How to Evaluate an Expression with Variables, Introduction to Algebra, Algebra I
Evaluate the expression 5t + 3. Use the provided variables to determine an answer. Scholars are provided with three different values for t and must evaluate the expression using each value for t. This resource would be appropriate for...
Curated OER
How Do You Subtract Fractions with Variables?
Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.
Curated OER
How Do You Subtract Two Rational Expressions with Different Denominators?
Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.
Curated OER
How Do You Subtract Two Rational Expressions with Different Denominators?
Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.
Mathispower4u
Evaluate an Expression with a Negative Exponent
The same rules apply. While watching the video, learners realize that the same rules apply to evaluate an expression with negative exponents as does simplifying an expression. The presentation shows a set of steps to evaluate a monomial...
Curated OER
How Do You Add Fractions with Variables?
Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.
Curated OER
How Do You Reduce Common Factors in a Rational Expression?
Multiply the given algebraic fractions. But first, reduce, reduce, reduce! It is a good rule of thumb to reduce as much as possible before multiplying. So how do you reduce rational expressions? Put the like terms together and cancel the...
Curated OER
How Do You Evaluate an Expression with Exponents?
An algebraic expression and a given value for the variable. Use the substitution property of equality to plug in the given value and solve the expression. Be careful and use the order of operations correctly because there is an exponent...
Curated OER
How Do You Solve an Inequality With Variables on Both Sides?
A direct instructional video of how to solve an inequality when you have the same variable on both sides of the inequality sign, this resource could be used in class or at home.
Curated OER
How Do You Solve an Equation with Variables on Both Sides?
So you have a variable on both sides of the equation. How do you solve this kind of equation? Just get like terms together on each side of the equation and then isolate that variable.
Curated OER
How Do You Solve an Inequality With Variables on Both Sides?
A direct instructional video of how to solve an inequality when you have the same variable on both sides of the inequality sign, this resource could be used in class or at home.
Khan Academy
Example 6: Subtracting Polynomials with Two Variables, Algebra I
Sal beautifully explains how to subtract two polynomial expressions with multiple variables. He groups like terms and the distributive property to create a single expression.
Curated OER
How Do You Add Fractions with Variables?
Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.
Curated OER
How Do You Subtract Fractions with Variables?
Combining terms that have fraction coefficients means you have to use your prior knowledge of adding and subtracting fractions. Find the least common denominator so you can combine the fractions. Finally put it all back together.
Curated OER
How Do You Solve a Word Problem Using an Inequality With Variables on Both Sides?
Don't skip this word problem! Take one piece at a time in writing out this inequality. Once you have an expression that represents the words in this inequality, the rest will seem easy. So watch this video to get a better understanding...
Curated OER
How Do You Solve an Equation with Variables on Both Sides and Grouping Symbols?
This equation with a variable on both sides and parentheses on both sides seems like it will be hard to solve. Don't despair! It's not as complicated as you might think. Just use the order of operations and take it one step at a time.
Khan Academy
Example 5: Adding Polynomials with Two Variables, Algebra I
While explaining how to add polynomial expressions with multiple variables, Sal uses academic vocabulary and a straightforward thinking process. This video is relatively short and would be appropriate for students working on homework or...
National Education Association
Independent and Dependent Variable
Introduce learners to independent and dependent variables with an informative video.The two variables are defined via inputs and outputs. It makes clear that the independent variable is the one that the person has control over,...
National Education Association
Identify Independent Variable and Dependent Variable on Various Representational Modes
The representation of a relationship really depends. The difference between dependent and independent variables is the focus of a short video that also includes examples of determining the types of variables. The presenter makes the...
Curated OER
How Do You Find Missing Angles in a Triangle With Variables?
Are you working on finding the missing angles in triangles in your class? Consider this video. An instructor uses the triangle sum theorem to create an equation that helps her find the missing angles. She explains each step and writes...
Curated OER
How Do You Find Missing Angles in a Triangle With Variables?
Are you working on finding the missing angles of triangles in your class? Consider this video. An instructor uses the triangle sum theorem to create an equation that helps her find the missing angles. She explains each step and writes...
Khan Academy
Multiplying and Dividing Rational Expressions 1, Algebra II
Provide your algebra class with some review of rational expressions in this video. Sal uses several sample problems to show viewers the process, and his explanations are clear and easy to understand.
Curated OER
How Do You Solve a Rational Equation by LCD Multiplication?
Use the least common denominator to solve rational equations with variables in the denominators of algebraic fractions. Learners can watch this video to find out how to do just this! An instructor solves 2 problems by finding the least...
Mathispower4u
Evaluate a Quadratic Expression with a Negative Value (Example)
Don't feel negative about quadratic expressions. An instructional video shows viewers how to evaluate a quadratic expression when the variable has a negative value. It presents two examples for the topic and works through these examples...