Mary has $50.00. She goes to the mall and buys lipstick and then she buys shampoo, which is half the price of the lipstick. She then spends half of what she has left on a purse, leaving her
with $15.00. How much did the shampoo cost? How much did the lipstick cost?

Hey there!

Let x be the price of lipstick

Let 1/2x be the price of shampoo

1.5x=20

x=13.33

1/2x=6.67

The shampoo costed $6.67, and the lipstick costed $13.33

Let me know if this helps , or if you have any more questions :)

f-1(x)= cube root of 19x squared/x

step-by-step explanation: