What are the answers! ? i rlly need em

Which one ? is the answer and how to find this answer

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

Abaseball team drinks 10/4 gallons of water during a game. which mixed number represents the gallons of water consumed? a) 1 1/2 gallons b) 2 1/2 gallons c) 2 3/4 gallons d) 3 1/2 gallons