Help plz

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

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers