If f(x)=2x^2-4x-3 and g(x)=2x^2-16, find f(x)+g(x) a. 4x^2-4x+13 b. 4x^2-4x-13 c. -4x-19 d. 4x^2-4x-19

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?