Find the gcf of 18a, 20ab, and 6ab. show work plz. i need it answered in like 5 min

2a

Step-by-step explanation:

18a: 1,2,3,6,9,18 then there's A

20ab: 1,2,4,5,10,20 then there's A and B

6ab: 1,2,3,6 then there's A and B

All have a 2 and an A in common so it's 2a

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.