An appliance repair service charges a flat fee of $75 per service call with an additional $55 per hour. if h represents the number of hours it takes to do the repair, which function models this situation?

Our require expression will be

Step-by-step explanation:

Since we have given that

Cost of repair service charges a flat fee per service =$75

Cost of additional charges per hour = $55

Let  h be the number of hours it takes to do the repair,

So, our function models this situation like this,

(because $75 is fixed charges which occurs at the time of service call and $55 is the additional depends upon the hours as the number of hours increases it will also increase. So, it will multiply with h to get the amount according to its number of hours.)

So,our require expression will be

3/6   and 9/18

step-by-step explanation:

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.