Find the length of the third side if necessary round to the nearest tenth 15, 25

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).