\[\sum_{n=1}^{7} 2(-2)^{n-1}\]
Answer:

Step-by-step explanation:
Answer:
I would not like to take your place but I can help you find someone. I don't have a laughing emoji. (On my computer)
Answer:
he pays 4320 :)
Step-by-step explanation:
Answer:
I will just choosé the second one
Because it is possible to compare sizes In one triangle rather than comparing with another one which we don't reàlly know of its sizes.