15. -2
16. A. The pool was originally empty
Solve for x by simplifying both sides of the equation, then isolating the variable.
x = 5
In general, there is no reason to believe they are parallel.
If the figure is described as a square, rectangle, rhombus, parallelogram, trapezoid, or any other quadrilateral with parallel sides, then they probably are. (Except AB and CD may be parallel in the trapezoid, so the answer there is "maybe.")
Integers are whole number, so it would be 0, so I hope you remember that integers are WHOLE numbers like 1,2,34,5 and so on c:
