If the computer store sells 200 laptops for $1000 each and 250 netbooks for $200 each. How much total profit does the store make?

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.

x = 12

y = 1

for the points!