Can't get Output In decimal format

couple of questions: this a truss that i am trying to process: a) in part 3; can't seem to get the output in decimal format, its coming out in fractions although they are the correct answers.

b) part 4; trying to use solve function to directly solve (A*F = B) for F , but since A,F,B are matrix it didn't work (I wonder if there is a way)

c) part 5; after evaluating array2table function i am getting [1x1] sym for my answers is there a way to fix that

the problem is in the attachment