12/18-Dorchester2-Test Day
Presentation
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Mathematics
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9th - 12th Grade
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Practice Problem
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Hard
Antoinette Norris Woodson
Used 1+ times
FREE Resource
7 Slides • 0 Questions
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December 18, 2024
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Quick dicussion of a review problem
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Quick discussion of a review problem
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A=lw
3x2+4x-4=6(3x-2)
3x2+4x-4 = 18w-12 add 12 to both sides
3x2+4x+8 = 18x subtract 18 from both sides
3x2-14x+8=0 factor
(3x-2) and (x-4) solve for x
3x-2 = 0 x-4=0
3x=2 x=4
x=2/3
x
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Substitute each value for x to find the length
x=2/3
3(2/3)-2 = -1.
In this case, it cannot have a negative value for the length of the rectangle.
x=4
3(4)-2) = 10
The correct answer is D. 10 ft. This is the length of the rectangle
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December 18, 2024
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