It's another word for unit rate if that helps
Multiply 4 by 1/3.
4 × 1/3 ⇒

×

4/3 = 1.3333333...
1.33333 ⇒ 1 1/3
The robots will be doing 1 1/3 of the work.
Answer:
15x 12y=489
Step-by-step explanation:
In the problem it says that x is the number of adult shirts which 15 and y is the number for a youth shirt. So it would be 15x 12y. Hope this helped! :D