Does an object have the same mass on earth and on the moon

Abag has more green balls than blue balls, and there is at least one blue ball. let bb represent the number of blue balls and let gg represent the number of green balls. let's compare the expressions 2b2b and b + gb+g. which statement is correct? choose 1

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Find the solution of this system of equation -7x+y=-20 9x-3y=36