Kylie earned $382.20 at her job when she worked for 21 hours. What was her hourly wage, in dollars per hour? On the double number line below, fill in the given values, then use multiplication or division to find the missing value.

$18.20 per hour

Explanation: $382.20 (total money earned in the span of 21 hours) divided by 21 (hours worked), this will give you the amount of money Kylie earned per hour.

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.