Daria made a profit of 21.00 dollars and sold each cup for .75 dollars but had to pay .10 dollars for every cup she used and her neighbor gave her a 3 dollar tip

21 = .75x - .1x + 3

Step-by-step explanation:

Daria made a profit of $21.00 selling lemonade. She sold her lemonade for $0.75 per cup, received a tip of $3 from a neighbor, but also had to buy each plastic cup she used for $0.10 per cup. Write an equation to represent this situation.

Total Profit = $21.00

x= number of cups

Price of each cup = $0.75

She paid $0.10 for cups used by her

Tip from neighbor= $3

Equation:

Expected Total cost of cups = 0.75 * x

= 0.75x

Cost of cups used = 0.10 * x

= 0.1x

Daria used 0.1x of the total cups that should be sold

Total sold= Expected cups to be sold - used cups

= 0.75x - 0.1x

Profit = Total sold + tip from neighbor

21.00 = 0.75x - 0.1x + 3

21 = .75x - .1x + 3 is the equation

0.75x + 0.10x + 3 = 21.00

Step-by-step explanation:

x = 21

I took a quiz and I had this same question.

-1/2 +2

step-by-step explanation:

good luck on your studies! : )

david edward.