You can factor out a 5n to get
5n(4m-3)
Answer:
183
Step-by-step explanation:
125+141+213+155+281=915
915 divided by 5=183
91.5 is the perimeter. It's just 5a.
Answer:
4c² + 11cd + 5d
Step-by-step explanation:
(–4c2 + 7cd + 8d) + (–3d + 8c2 + 4cd)
-4c² + 7cd + 8d - 3d + 8c² + 4cd (opening bracket)
8c²-4c²+7cd + 4cd + 8d - 3d
= 4c² + 11cd + 5d