Please help. What is value of x?

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X=

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?

(x-5)1/2+5=2 what is possible solution of this equation

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.