If f(x)=7(x-1)+8 what is the value of f(11)

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

How is this equation completed? i cannot find any examples in the book.