I need someone to help with this. Offering all my points.

(I can only answer the first one)

y = 130

x = 30

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.

50.6

step-by-step explanation: