There are 4 different french books and 4 different spanish books. how many ways are there to arrange them on a shelf if

(a) books of the same language must be grouped together, french on the left, spanish on the right?

(b) french and spanish books must alternate in the grouping, beginning with a french book?

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so,about which interval is it approximately symmetric?

W-16=-12 solve each one step equation plz