Mari is participating in national lemonade stand day she spends 18 dollars for start up costs which include the supplies to make the lemonade cups and advertising how will mari end up the lemonade stand breaking even

Mari has spent $18 on startup costs (supplies to make the lemonade cups and advertising)

The break-even point is the point at which the revenue earned just meets the costs

Now, to break-even she needs to make sure she sells lemonade worth at-least $18 on the national lemonade day.

If she manages to make more than $18, then anything beyond $18 would be her profit.

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.