If a farmer has a field one square mile and get another 1/2 square miles how many miles does he have?

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Solve for x and select the correct answer