Help me with this please

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank