"Are you going shopping today, or are you going tomorrow?" Simple, Complex, or Compound sentence?

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

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