Given: r = {v3, v5, v7, v13} . why is r not a relation?
r is a series
r is a sequence
r is not a set of ordered pairs
r is a set of rational numbers

The substances that are necessary for producing of certain hormones and that store and transport vitamins

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.

Can someone me with my physics questions? i need correct answers only!