Which ordered pair (r, s) is a solution to the given system of equations? 5r+7s=61 and -5r+7s=-19

What statement is true? 2x^2-9x+2=-1

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.