It costs Sally 20 cents to make a cup of lemonade, and she sells each cup for 50 cents. She is using the following identity to c
alculate the amount of money she will make. 50n – 20n = n(50 – 20) n(50 – 20) = 30n If Sally sells 10 cups of lemonade, how much money will she make?
1 answer:
She would make 3.00 dollars
50(10) - 20(10) = (10)(50 - 20)
500 - 200 = (10 * 30)
300 = 300
(10)(50 - 20) = 30(10)
(10 * 30) = 300
300 = 300
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