WK3HW - JO

# WK3HW - JO - WK3HWJO Section2.1 51. a.) Approximately how...

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WK3HW – JO Section 2.1 51. a.) Approximately how much of the \$850 monthly payment goes for interest in year 5? In year 15? In year 25? Year 5 – about \$750 Year 15 – about \$600 Year 25 – about \$300 b.) In what year will the monthly payment be equally divided between interest and principal? In the 22 nd year Section 2.2 15. 2x – y = 9 -y = -2x +9 y = 2x - 9 y = mx +b m = 2 and b = -9 so the slope is 2 and the y-intercept is -9 19. 6x -9y = 16 -9y = -6x +16 y = 6/9x -16/9 6/9 = 2/3 y = 2/3x – 16/9 y = mx + b m = 2/3 and b = -16/9 so the slope is 2/3 and the y-intercept is -16/9

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33. 4x – 3y = 6 and 3x + 4y = 8 -3y = 4x + 6 4y = 3x + 8 y = 4/3x - 2 y = -3/4x +2 The slopes are the coefficient of x The slopes are 4/3 and 3/4, so the lines are perpendicular. 35. 3x + 2y = 8 and 6y = 5 -9x 2y = 3x + 8 6y = 5-9x y = -3/2x + 4 y = -3/2x + 5/6 The slopes are the coefficient of x The slopes are -3/2 and -3/2, so the lines are parallel. 41.
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## This note was uploaded on 01/17/2010 for the course MATH 105 taught by Professor Dobra during the Spring '09 term at Upper Iowa.

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WK3HW - JO - WK3HWJO Section2.1 51. a.) Approximately how...

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