What is the slope of the line for (9,6) & (-2,17)

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?