Lorenzo plans to purchase three identical shirts. The shirts are on sale for 20% off. Let c represent the cost of each shirt. Which expressions can Lorenzo use to calculate his total cost for the three shirts after the discount? Select each correct answer.
1.20(3c)
3(c−0.20c)
3c−0.20(3c)
0.80(3c)
Let c-----------> represent the cost of each shirt without discount t-----------> total cost for the three shirts after the discount d----------> discount
we know that d=3c*0.20 t=3c-d-------------> 3c-[3c*0.20]--------> 3c*[1-0.20]=3c*(0.80)
