A postal clerk sold some 15 cent stamps and some 25 cent stamps. Altogether, 15 stamps were sold for a total cost of $3.15. How many of each type of stamp were sold?

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.

What is the ordered pair that represents the linear inequality y< 6x-4