All of the following are equivalent except . 1.) -5 x + 5
2.) -5( x - 1)
3.) (5 - 5) x
4.) 5 - 5 x
this is multiple choice

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?