Mary's children decide to run a lemonade stand to earn some extra money. the cost to start the business is $1.20 and each cup of lemonade costs 6 cents to make. if lemonade sells for 10 cents a cup, how many cups must mary's children sell to make a systems of equations

Step-by-step explanation:

Givens

First, we need to represents the cost of their investment.

, because each cup costs 6 cents, and the initial costs of all is $1.20.

That means,

They can produced 20 cups.

However, they already sell a cup for 10 cents. So, how many cups they need to sell to gain profits? We need to establish a similar relation,

This means if they sell 12 cups, they will just cover the investement, that is, zero profits.

Therefore, they need to sell at least 13 cups to gain profits.

c

step-by-step explanation: