Answer:
[tex]1.50S+2.50P<20[/tex]
Step-by-step explanation:
Givens:
The cost of the salt would be expressed
[tex]1.50S[/tex]
The cost per kilogram of pepper would be
[tex]2.50P[/tex]
The whole problem is modelled by this inequality
[tex]1.50S+2.50P<20[/tex]
Basically, this expression states that Noow is not gonna pay $20 or more, and the price of salt per kg is $1.50 and $2.50 per kg of pepper.