Which expression represents the total volume of the pictures shown if each cube has a side length of e?

Which expression is equivalent to the expression below? (6c^2 + 3c) / (-4c + 2) / (2c + 1) / (4c - 1)a. 3c(2c-1) / (2c + 1)b. -3c(2c-1)^2 / (2c + 1)^2c. 3cd. -3c(just took the test its d. -3c)

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

If a is a nonzero real number then the reciprocal of a is