5-Minute Check on Chapter 2 Transparency 3-1 5-Minute Check on Chapter 2 Evaluate 42 - |x - 7| if x = -3 Find 4.1  (-0.5) Simplify each expression 3. 8(-2c + 5) + 9c 4. (36d – 18) / (-9) A bag of lollipops has 10 red, 15 green, and 15 yellow lollipops. If one is chosen at random, what is the probability that it is not green? Which of the following is a true statement Standardized Test Practice: A 8/4 < 4/8 B -4/8 < -8/4 C -4/8 > -8/4 D -4/8 > 4/8 Click the mouse button or press the Space Bar to display the answers.

Rational Expressions with Like Denominators Lesson 12-6 Rational Expressions with Like Denominators

Click the mouse button or press the Space Bar to display the answers. Transparency 6

Transparency 6a

Objectives Add rational expression with like denominators Subtract rational expression with like denominators

Vocabulary None new

Key Concept xxxx

Example 1 Find The common denominator is 15. Add the numerators. 4b Divide by the common factor, 5. 4b 3 Simplify. Answer:

Example 2 Find The common denominator is c + 2. Factor the numerator. Divide by the common factor, c + 2. 1 Simplify. Answer:

Example 3 Geometry Find an expression for the perimeter of rectangle WXYZ. Perimeter formula

Example 3 cont The common denominator is Distributive Property Combine like terms. Factor. Answer: The perimeter can be represented by the expression

Example 4 Find The common denominator is x - 3 The additive inverse of (x – 5) is –(x – 5) Distributive Property Simplify. Answer:

Example 5 Find Rewrite using common denominators The denominator s – 11 is the same as - (-s + 11) or - (11 – s). Rewrite the second expression so that it has the same denominator as the first. Rewrite using common denominators The common denominator is Simplify. Answer:

Summary & Homework Summary: xxxx Homework: pg