Abcd is a parallelogram. a is the point (2,5), b is the point (8,8) and the diagonals intersect at (3.5, 2.5). what are the coordinates of c and d? how do i work this out?

How can you find the mean absolute deviation (mad) for this set of data?

Line u passes through points (-52, -18) and (-29, 53). line v passes through points (90, 33) and (19, 56). are line u and line v parallel or perpendicular?

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points