Determine the lines are perpendicular parallel or neither
2x-3y=9 and6y-4x=1

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

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?