How many cubes with edge lengths of 1/2 inch are needed to fill this cube?

What is the value of x in the diagram below?

Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10