Answer: 65/32
Step-by-step explanation:
You can first distribute the number into the parenthesis: 3n + 2 - 8n. Now, combine the like terms (n): -5n + 2. It can either be -5n + 2 or 2 - 5n.
An=Asub1(r)n-¹
=5(-2)7-¹
=5(64)
A7=320
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