Answer:
5. 2[4 + n]
6. 7 + 314n
7. 3 + n = ⁿ⁄8
Explanation:
5.Twice the sum means you need to double the sum. That is why that 2 is on the outside of the sum.
6. 314 OF a number means "the product of" a number. Then, you continue with your SUM by putting a "+" after 314n.
7. I could not make use of your sentence here, so I went with the above answer based on how the sentence might be structured.
I am joyous to assist you anytime.