Question

Area of the quadrilateral formed by the lines<br />2x-5y+7=0, 5x+2y-1=0, 2x-5y+2=0 and<br />5x+2y+4=0​

Answer 1

Answer:

So he buys 60 pens at 3 for 30 that means 60 for 600. He buys the rest 60 at 4 for 48 that means 60 for 720. So the total cost of 120 pens is 1320. He sells 120 pens at 5 for 56 that means 120 for 1344

Step-by-step explanation:

So he buys 60 pens at 3 for 30 that means 60 for 600. He buys the rest 60 at 4 for 48 that means 60 for 720. So the total cost of 120 pens is 1320. He sells 120 pens at 5 for 56 that means 120 for 1344