I need help solving thing please

$2.64

Step-by-step explanation:

Step 1) 0.32×4.5=1.44

Step 2)0.48×2.5=1.2

Step3)1.44+1.2=2.64

Therefore, the total cost of potatoes and onions would be  $2.64

2.64

Step-by-step explanation:

Quantity of potatoes = 4.5 pounds

p = 4.5 pounds

Quantity of onions = 2.5 pounds

n = 2.5 pounds.

Plugin p = 4.5  and  n = 2.5 in the expression

0.32p + 0.48n = 0.32*4.5  + 0.48*2.5

                        = 1.44 + 1.2

                        = 2.64

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.