Any boys on here need a gf 13-16

Jessica is a custodian at oracle arena.she waxes 20 m2 of the floor in 3/5 of an hour. jessica waxes the floor at a constant rate.at this rate how many sqaures meters can she wax per hour

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Find solution of the linear equation y = 2/3x + 1/3