Select the two figures that are similar to each other.

Step-by-step explanation:

If you multiply the values of the green rectangle by 2, you get the values of the yellow rectangle.

Therefore these two figures are similar.

Green : yellow : : 1 : 2

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.

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads