Please help me find the area

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

How many grams the dog will eat in 3 days?

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?