M=−8r ^2 +11r−6 T=−7r ^2−9r+14 M+T= Answer is: −15r ^2 +2r+8

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

8 0

Answer:

$\large\boxed{M+T=-15r^2+2r+8}$

Step-by-step explanation:

$M=-8r^2+11r-6\\T=-7r^2-9r+14\\\\M+T=?\\\\\text{Substitute:}\\\\M+T=(-8r^2+11r-6)+(-7r^2-9r+14)\\\\M+T=-8r^2+11r-6-7r^2-9r+14\qquad\text{combine like terms}\\\\M+T=(-8r^2-7r^2)+(11r-9r)+(-6+14)\\\\M+T=-15r^2+2r+8$

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