How many solutions are there to the equation x2 - 15 =0?

A. 0
B. 1
C. 2
D. 4
E. 16

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle

Abcd is reflected across the x- axis, then rotated 90 clockwise about the orgin, and finally reflected across the line y= x to form a’ b’ c’ .