Which expression represents the product of 3 and (1.2n + 2.5)

a.6.7n
b.7.5n
c.1.2n + 7.5
d.3.6n + 7.5

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

Can someone me out here and the tell me the greatest common factor

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.