Help me pleaseEe

Click on the graphic until you find the right quotient. (36xa - 30xb) ÷ (-6x2)

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?

(60 points) explain this in detail