8.612 a rational number

()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

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle