PLEASE HELP What is the equation of a line that is perpendicular to -x+2y=4 and passes through the point (-2,1) ?

Write the equation -x+2y=4 in slope-intercept form

Identify the slope of the line represented in part a.

What is the slope of the line perpendicular to the line in steps a and b?

Write the equation of the perpendicular line in slope-intercept form.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm