Solve showing all work anf simplify completely 9/18+1/3

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Is the figure congruent? yes or no?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?