Section_8_2_Notes

# Section_8_2_Notes - 70. There are twice as many par 4’s...

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Section 8.2 Systems of three equations and three unknowns: We can use a combination of elimination or substitution to solve Example 1: Solve 4x + 2y + 5z = 6 2x – y + z = 5 3x + 2y - z = 4

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Example 2: Solve x – 2y + 3z = 11 4x + 2y – 3z = 4 3x + 3y - z = 4
Example 3: Solve 2x – 5y + 5z = -1 6x – 15y + 15z = -14 2x - 2y - 5z = 4

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Example 4: Solve -2x – 4y – z = 1 3x + 3y + z = 1 -8x – 10y – 3z = -1
Word Problems: Example 1: An 18 hole golf course has par 3’s, par 4’s, and par 5’s. A golfer who shoots par shoots

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Unformatted text preview: 70. There are twice as many par 4’s as par 5’s. How many of each type of hole are there? Example 2: Last year, Wal-Mart spent 87.4 billion dollars on newspaper, television, and radio ads. The total amount spent on television and radio ads was only 3 billion more than was spent on the newspaper ads. The amount of money spent on newspaper as was 5.3 billion more than spent on television ads. Find the amount of money spent on each type of ad....
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## This note was uploaded on 04/07/2008 for the course MATH 112 taught by Professor Taylor during the Spring '08 term at Alabama.

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Section_8_2_Notes - 70. There are twice as many par 4’s...

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