The answer to the second problem is listed as 12, but it should be -12.
In this lesson, students will learn how to evaluate mathematical expressions by finding the value for a given set of terms. They will understand the importance of identifying the keyword "value weight" in their problem and know how to plug in the given values for each variable. The lesson also includes a rational expression problem, which will show students how to apply the order of operations to simplify the expression before finding the value. By the end of the lesson, students will be able to evaluate different kinds of expressions and solve problems with ease.
How to evaluate mathematical expressions
I show how to solve math problems online during live instruction in class. This is my way of providing free tutoring for the students in my class and for students anywhere in the world. Every video is a short clip that shows exactly how to solve math problems step by step. The problems are done in real time and in front of a regular classroom. These videos are intended to help you learn how to solve math problems, review how to solve a math problems, study for a test, or finish your homework. I post all of my videos on YouTube, but if you are looking for other ways to interact with me and my videos you can follow me on the following pages through My Blog, Twitter, or Facebook.