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12-05-2017
Mathematics

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Math Help PLEASE!!

Simplify: (3r² + 7r + 1) + (4r² - 8r - 2)

A. 7r² + 15r - 1
B. 7r² - r - 1
C. 7r² - 15r - 3
D. -r² - r - 1

Respuesta :

fussellk fussellk

12-05-2017

combining like terms............
3r^2 + 7r + 1 + 4r^2 - 8r - 2
7r^2 - r - 1

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