Plz how can you use the fact that right triangles have perpendicular sides to determine if the (x, y) coordinates of a triangle’s three vertices represent a right triangle?

Jared had 3/7 of the minutes on a family phone plan remaining for the month. the plan is shared by 2 people. if divided equally what portion of the minutes remaining on the phone plan would be avalible for each person

The diagram shows a cuboid abcdefgh abcd is a square with area 25cm². find the volume of the cuboid.

Describe a situation where it would be beneficial to round decimals to the nearest dollar. explain why you would use rounding in that situation.