Someone give me a zoom code im bored

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Ineed with math stuff it involves graphs

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?