• Priya orders takeout from a local restaurant. Her order is $24 and she uses a coupon for
25% off. She wants to know the total price, after tipping the driver 15%.
• Complete the equation to show the relationship between the sale price, s.
and the regular price.
S= ? • ?

1) The total price, after tipping the driver 15% is 21.6

2) s = 0.75r

Step-by-step explanation:

Price of order = $24

She uses a coupon for  25% off.

Discount =

So, Cost after discount = 24-6=18

She wants to know the total price, after tipping the driver 15%.

So, Tip to driver = 15% of 24 = 3.6

So, Cost including tip = 18+3.6=21.6

Thus the total price, after tipping the driver 15% is 21.6

Now we are supposed to find equation to show the relationship between the sale price, s.  and the regular price.

Let the regular price be r

Discount = 25%

So, Discounted price =

We are given that s denotes the sale price

So, s = 0.75r

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.