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OpenStudy (anonymous):
Adding and Subtracting Polynomials The perimeter of a trapezoid is 39a – 7. Three sides have the following lengths: 9a, 5a + 1, and 17a – 6. What is the length of the fourth side? (1 point) 12 a – 7 8a – 2 31a – 5
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OpenStudy (anonymous):
8a-2
OpenStudy (xanthe):
(39a-7)-(sum of the 3 sides given)...
OpenStudy (xanthe):
Yea!:D
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