What is the additive inverse of the complex number 9-412
-9-41
-9 +41
9 - 41
9 + 41

Additive inverse means the sum should be 0

so all you gotta do is multiply the complex number by -1

(the question isn't clear so I can't state the option)

you should at least use a calculater

step-by-step explanation:

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.