Find the surface area of the figure?

What are “like terms”? why can we only add like terms?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.