Kayla has n marbles. she groups them by three and has one left over. she groups them by sevens and has four left over. kayla has more than five marbles. what is the least number of marbles kyla could have?

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?