Algebra 1A Vocabulary 1-2 Part 2

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Presentation transcript:

Algebra 1A Vocabulary 1-2 Part 2 You evaluate an algebraic expression by replacing each variable with a given number. Then, simplify the expression using the order of operations. For example,

Simplify and use Order of Operations

Sample Problems What is the value of each expression when a = 3 and b = 4?

Evaluating a Real-World Expression The shipping cost for an order at an online store is one tenth of the cost of the items you order. What is an expression for the total cost of a given order? What are the total costs for orders of $43, $79, $95, and $103? THINK: How can you use a model to solve this problem? MODEL:

Evaluating a Real-World Expression DEFINE: Let c = the cost of the items WRITE: Total cost = _________ + 1/10 x_________

Use the Formula to Complete the Table

Error Analysis The student made an error in simplifying the expression below. Find the error and simplify the expression correctly.