Six friends order lunch. Which expression shows the total cost if each person orders one sandwich and one cookie?

6(4.75+x) because there is 6 friends and a sandwich cost 4.75 plus X (the cookie)

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.