To find Juan's total profit after his first day running the lemonade stand, we need to consider the total earnings and total expenses throughout the days.
Given that:
- The first day's profit was $12.
- Each day, he would earn money (from sales) and spend money (on supplies).
To compute the total profit, we would add all the earnings and then subtract all the expenses.
Without knowing the actual figures for each day, let's break down the options you provided:
a. 16 - 7 - 22 - 12 - 18 - 9 This indicates subtracting a series of values (expenses) but does not show that any earnings are added.
b. 16 + 22 + 18 + 7 - 12 - 9 This indicates that some earnings are added first and then expenses are subtracted, which is a reasonable approach to finding profit.
c. 16 - 7 + 22 - 12 + 18 - 9 This mixes subtraction and addition, but the use of subtraction before addition may not correctly represent the total profit calculation since it starts by subtracting an expense.
d. 16 + 22 + 18 + 7 + 12 + 9 This expression suggests all values are being added together without any expenses being subtracted, which does not give the net profit.
From this reasoning, option b. 16 + 22 + 18 + 7 - 12 - 9 is the correct expression to find the total profit, as it combines the earnings and properly subtracts the expenses.