203-exam_1_solutions - Exam #1 Solutions Math 203 Spring...

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Unformatted text preview: Exam #1 Solutions Math 203 Spring 2011 Fred Bourgoin 1. Translate English phrase or sentence into an algebraic expression or equation. (12 points) (a) 5 more than twice a number Solution. 2 x + 5 (b) The difference between a number and 3 is 9. Solution. x- 3 = 9 (c) Fifteen times the sum of a number and twice another number Solution. 15( x + 2 y ) 2. Calculate. (8 points) (5- 6) 2- 4 | 5- 9 | 135- 3 5 2 Solution. Follow the order of operations. (5- 6) 2- 4 | 5- 9 | 135- 3 5 2 = (- 1) 2- 4 | - 4 | 135- 3 5 2 = 1- 4(4) 135- 3 25 = 1- 16 135- 75 =- 15 60 =- 1 4 . 3. Plot each of the points (1 , 2), (- 2 , 5 2 ), and (3 , 0). (This problem worth 6 pts) y x 1 2 3- 1- 2- 3- 3- 2- 1 1 2 3 (1 , 2) (3 , 0) (- 2 , 5 2 ) 1 4. Using the graph below, find the slope, the y-intercept, and an equation for the line. (8 points) y x 1 2 3- 3- 2- 1 1 2 3 (0 , 2) (3 , 0) Solution. From (0 , 2) to (3 , 0), we have m = rise run =- 2 3 =- 2 3 ....
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This note was uploaded on 04/19/2011 for the course MTH 203 taught by Professor Staff during the Spring '08 term at Grand Valley State University.

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203-exam_1_solutions - Exam #1 Solutions Math 203 Spring...

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