Warm-Up #8 (Monday, 9/21/15) Mary has a box that has a length of 1, a width of 1.2, and a height of 2.56. What is the volume of Mary’s box? Peter has.

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Warm-Up #8 (Monday, 9/21/15) Mary has a box that has a length of 1, a width of 1.2, and a height of 2.56. What is the volume of Mary’s box? Peter has a rope that is 2 1 3 𝑖𝑛𝑐ℎ𝑒𝑠 𝑙𝑜𝑛𝑔. He needs to have 4 1 2 inches of rope. How much more does he need?

Homework (Monday, 9/21/15) Lesson 2.04_page 107 #4, 5, 6, 7

Lesson 2.04 Simplifying Expressions

In order to simplify expression, you combine all the “like terms” What is combining “like terms” mean? Like Terms: Terms with the same variable and the same exact powers

Example 1 3x+3+7yx+8+14x

Example 2 𝑥𝑦 2 + 𝑦𝑥 2 +2𝑥𝑦−13𝑦𝑥

Example 3 − 𝑦 2 −5 𝑥 2 − 𝑥 2

You Try 𝑦 2 + 𝑦 2 +12𝑥𝑦−13𝑦𝑥 2) 𝑚𝑦 2 + 4𝑦 2 +15𝑦−𝑥 2) 𝑚𝑦 2 + 4𝑦 2 +15𝑦−𝑥 3)−2 3𝑦 2 −2 𝑥 2 + 𝑦 2

Example 4 Simplify and evaluate the expression 2(4x+3)-1; x = 7

Example 5 Simplify and evaluate the expression 3x – 7x +y; x=1 and y=2

Example 6 The length and width of the rectangles are given below. Find an expression for the area and an expression for the perimeter. Length is 4x +2 Width is 3