Concept explainers
To calculate: The number of color photos to be added.
The total number of photos in the exhibit.
Answer to Problem 31E
The total number of photos in the exhibit is
Explanation of Solution
Given information:
the information given in the question:
Number of photos for display in an art exhibit =
Number of color photos =
Number of black and white photos =
More color photos are to be added so that they represent
Concept used:
Calculation:
As per the problem
Number of photos for display in an art exhibit =
Number of color photos =
Number of black and white photos =
For color photos to represent
Consider
Now,
Number of color photos after addition =
Total number of photos after addition of
Consider color photos now represent
Write the proportion
Substitute
Use cross product property
Use distributive property
Multiply
Subtract
Simplify
Subtract
Simplify
Divide each side by
Hence,
Therefore,
Total number of photos after addition of
Hence,
The total number of photos in the exhibit is
Chapter 7 Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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