Do you know the answer?

Can (2,3 and square root 10) be sides ona right triangle?

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.

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?