Find the least common denominator for the following rational expressions.
18/r-4, -5r/r^2-5r+4, r+7/r^2-4r-5

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.

1/800 is the right answer