How many square roots does the number 20 have?

Which system of linear inequalities is represented by the graph?

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

What statement is true? 2x^2-9x+2=-1