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To find: the dimensions of each rectangle and make sketch of rectangles expressing all dimensions in terms of w.
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Answer to Problem 7P
The red triangle dimensions width is 9 cm and length is 24 cm.
The blue triangle dimensions width is 14 cm and length is 22 cm.
Explanation of Solution
Given information:
The length of a red rectangle is 15 cm more than its width w. a blue rectangle, which is 5 cm wider and 2 cm shorter than the red one, has perimeter 72 cm.
Sketch:
Calculation:
Consider w is the width of the red rectangle, and then
Consider
If the Perimeter p means adding all 4 sides of the rectangle,
Then perimeter for blue rectangle,
Solve for w,
Therefore the width of red rectangle is 9 cm.
Then length of red rectangle,
And width of blue rectangle,
Length of blue rectangle,
Chapter 3 Solutions
Algebra: Structure And Method, Book 1
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