Step-by-step explanation:
you would divide 489 by 10 and then times that number by 15 and the divide 20 and get your answer that way
Use a tool called a protractor
Answer:
15, 8 inch boards
Step-by-step explanation:
120/8=15
It's a 3rd degree polynomial judging by the shape. Use the 3 factored zeros of x=-1,0,2 to get x(x+1)(x-2)
multiply this out to get

I plotted it too