A, b, c and d are positive integers, such that a+b+ab = 20, c+d+cd = 34. Find (a+b+c+d)·a·b·c·d

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path