If f(x) = 7(x-1)+8, what is the value of f(1)

Pls! does anybody know a shortcut for answering these types of questions in the future?

Alonso walked with his friend andy one day, and wanted to compare their speeds. alonso walked 3 miles in one hour, and andy walked 2 miles in 2 hours. complete the table to graph the relationship for each person.

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2