Ralph wants to show 13/20 on another grid of the same size how many squares must be shaded

What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x2−9x−3 enter your answer in the boxes.

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1