
Concept explainers
(a)
To complete: The given table.
(a)

Answer to Problem 34E
The complete table is shown in table (1).
Explanation of Solution
Given:
It will take 2 hours to clean the park when working alone.
It will take 1.2 hours to clean the park when working together.
Calculation:
Let
First complete the table as follows.
Work rate | Time | Work done | |
You | |||
Friend |
Table (1)
Therefore, the complete table is shown in table (1).
(b)
To explain: The sum of the expressions represents in the last column, write and solve an equation to find the time taken by friend to clean the park.
(b)

Answer to Problem 34E
It would take 3 hours to clean the park.
Explanation of Solution
Given:
It will take 2 hours to clean the park when working alone.
It will take 1.2 hours to clean the park when working together.
Calculation:
Let
The sum is the amount of time it would take you and your friend to work together.
Therefore, it would take 3 hours to clean the park.
Chapter 7 Solutions
BIG IDEAS MATH Algebra 2: Common Core Student Edition 2015
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