\you want to find out the favorite subjects of students at your school. which plan describes a good sample? a. interview every tenth student leaving an all-school assembly. b. interview a group of students on their way to the library. c. interview students leaving a classroom. d. interview a group of students standing together in the hallway.

the answer to the expression is 83

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.