Question

Please help with last two review questions for upcoming exam!

Answer 1

These are the last two review questions to prepare for the upcoming exam. I would greatly appreciate any and all help:
http://imgur.com/SVtrFak

Answer 2

Figured it out. Nonetheless, thanks to those who considered offering help.

Answer 3

y=x^2+10x-15
=x^2+10x+(10/2)^2-(10/2)^2-15
=(x+5)^2-25-15
=(x+5)^2-40
vertex is (-5,-40)