What reason accurately completes the proof? converse of the same-side interior angles theorem same-side interior angles theorem property of rectangles (opposite sides are parallel) converse of the alternate interior angles theorem?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Standard deviation of 19,29,21,22,23

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics