Help pls

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

What sums are equal to 6/12? choose all answers that are correct a.6/12+6/12+6/12+6/12+6/12+6/12 b.2/12+1/12+1/12+2/12 c.5/12+1/12 d.1/12+1/12+1/12+3/12 plz : )