A department store is having a storewide 20% discount sale. The sale price Of an item that has a regular price of Ris S= R - 0.2R. Write the inverse function. What is the regular price for an item that is on sale for $38.40?

Respuesta :

Answer:

R=48

Step-by-step explanation:

S=R(1-0.2)         R = 38.40/.8

S=R(.8)              R = 48

R=5/.8