Which pair shows equivalent expressions? 2 (two-fifths x + 2) = 2 and two-fifths x + 1 2 (two-fifths x + 2) = four-fifths x + 4 2 (two-fifths x + 4) = four-fifths x + 2 2 (two-fifths x + 4) = 2 and two-fifths x + 8

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?