Explanation Given information: A can pave a certain length of highway in 9 hour and B can do the same job in 12 hours. Formula used: Steps to solve the applications of direct variation: Step 1: Identify the variation between the variables. Step 2: Translate the expression into variation equation. Step 3: Simplify and determine the desired value. Step 4: Perform the check for the calculation by comparison and providing reasons regarding the answer. Step 5: Conclude the answer by providing final statement. Formula to calculate the rate, Rate = Distance Time Calculate: Identify the variation between the variables: Consider that it will take x hours to complete the job if both will do the job. Since A can pave a certain length of highway in 9 hour and B can do the same job in 12 hours. Translate the expression into variation equation: Convert the problem into mathematical form. Use the rate formula Rate = Distance Time to find the part of the job done. Thus, Crew Time taken Part of the job done per hour A 1 hour 1 9 B 1 hour 1 12 Combined x hours ( 1 9 ) x + ( 1 12 ) x Because the job is equal to 1. Thus, combined job done, ( 1 9 ) x + ( 1 12 ) x = ( 1 ) Simplify and determine the desired value: Solve the equation ( 1 9 ) x + ( 1 12 ) x = ( 1 ) for x

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ISBN: 9781323235911

Author: BITTINGER

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Chapter 12, Problem 30RE

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To calculate: The time it will take for both crew A and crew B to do the job together if A can pave a certain length of highway in 9 hour and B can do the same job in 12 hours.

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Chapter 12, Problem 29RE

Chapter 12, Problem 31RE

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Ch. 12.1 - Objective 11.3a: Factor trinomials of the type...Ch. 12.1 - Prob. 2SR Ch. 12.1 - Prob. 1DE Ch. 12.1 - Prob. 2DE Ch. 12.1 - Prob. 3DE Ch. 12.1 - Prob. 4DE Ch. 12.1 - Prob. 5DE Ch. 12.1 - Prob. 6DE Ch. 12.1 - Prob. 7DE Ch. 12.1 - Prob. 8DE

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The time it will take for both crew A and crew B to do the job together if A can pave a certain length of highway in 9 hour and B can do the same job in 12 hours.

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To calculate: The time it will take for both crew A and crew B to do the job together if A can pave a certain length of highway in 9 hour and B can do the same job in 12 hours.

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Chapter 12 Solutions