4/9 divided by 2/3 divided by 5/6 equals

What’s the numerical coefficient of 6xy

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?