Please help. I also will post another question I need help with. Thank you if you help.

Solve the system of equations. y= 2x y= x^2 - 15

Which of the following represents the range of the graph of f(x) below

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.