If I sell shirts for $15 a piece plus a a shipping fee of $20, what would my slope be?

Can some one explain this i got sent this. is this a threat i’m scared

Acompany charges $0.10 for each letter engraved. bobby plans to spend no more than $5.00 on the engraving on a jewelry box. write and solve an inequality to find the maximum number of letters he can have engraved.

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x