Ronita moved 1/3 of the books in her backpack to the kitchen table. three books were already on the table. there are 5 books on the table now. how many books, b, were originally in ronita's backpack?

Which of the following best describes the figure?

Answer! if you don’t mind, can you explain

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?