What is the greatest common factor of 540 and 600

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !