Correct answer only ! jude is placing boxes on a shelf that holds up to 80 lb. he has x small boxes that weigh 5 lb each and y large boxes that weigh 12 lb each. jude needs at least 4 small boxes on the shelf. select all inequalities that model this situation.

5x + 12y ≤ 80

x ≥ 4

y ≥ 0

for the points! : )

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.