Answer:
[tex]18+0.08B\geq 75[/tex]
Step-by-step explanation:
there is a flat fee of $18
there is an incremental fee of $0.08 per ball which can be shown as [tex]0.08B[/tex]
so the amount that Carolina will spend would be [tex]18+0.08B[/tex]
the promotion only applies if Carolina spends $75 or more. the greater than or equal to symbol is [tex]\geq[/tex]
so the inequality would be [tex]18+0.08B\geq 75[/tex]
however, we could simplify this to [tex]0.08B\geq 57[/tex] but it is not necessary
