Solve sin x -1/sqrt of 2

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Solve 3x-18=2y and 5x-6y=6 by elimination show work

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.