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Published byTheodore Shelton Modified over 9 years ago
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Warm-up 8/26/13 Add, subtract, or multiply, then simplify. 1. 2. 3.
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Honors Warm-up 8/26/13 Write an expression for the perimeter of the figure at the right. What is the simplified version of this expression? 2.
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Polynomial Word Problems
Goal: Use polynomials to represent real-life situations.
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Word Problems Decide if the problem involves addition, subtraction or multiplication. If polynomials are given: add, subtract or multiply like normal. If polynomials are not given: use a formula. Area = length times width Perimeter = add all sides
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Word Problem #1 From 1991 through 1998, the number of commercial C and education E Internet websites can be modeled by the following equations, where t is the number of years since 1991. C = 0.321t2 – 1.036t E = 0.099t2 – 0.120t Find a model for the total number of commercial and education sites. T = 0.42t2 – 1.156t
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Word Problem #2 From 1890 through 1990, the number of men M and women W in the US labor force can be modeled by the following equations, where t is the number of years since 1890. M = t t W = 0.007t2 – 0.228t Find a model for the total number of people in the US labor force. T = t t
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Word Problem #3 A triangle has 3 sides with lengths 8x + 6, 5x – 5, and -6x What is the perimeter of the triangle? 7x + 13
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Word Problem #4 The dimensions of a window are 3x + 10 and 2x What is the area of the window? 6x2 +38x + 60
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Word Problem #5 Find the area of the figure below. 15 x 4 x
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Word Problem #6 Find the area of the figure below. 8 2x 3
2x2 + 14x + 24 8 2x 3 x
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Word Problem #7 Find the area of the blue region. 3x 6 7
6x2 + 11x + 42 3x 6 7 2x
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Word Problem #8 The cost of a video game can be modeled by the equation C = 3x The number of games sold can be modeled by the equation N = 8x – 7. Write a model for the revenue from the sale of the games. R = 24x2 – 5x – 14
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practice Worksheet – “Polynomial Word Problems”
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homework Page 581 #65, 67 Page 588 #54, 56, 58
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