Which expression is equivalent to (h2+9h-1)(-4h+30

The product of two negative rational numbers is always zero sometimes zero never zero

()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

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1