What does a vertical line to the left of multiple staves indicate to a musician?

Which statement is true about the function f(x)= –? the domain of the function is all negative real numbers. the range of the function is all positive real numbers. the domain and range of the function have opposite signs. the domain and range of the function are the same. which statement is true about the function f(x)= –? the domain of the function is all negative real numbers. the range of the function is all positive real numbers. the domain and range of the function have opposite signs. the domain and range of the function are the same.

Daphne has calculated the total cost of a meal to be $5. she wants to make 70 percent on each meal. what will be the cost of the meal after adding the percentage? a. $8.50 b. $7.14 c. $3.50 d. $14.00

Igotta why is there only 2 semesters and 4 quarters and not 4semesters and 4 quarters? 1 quarter for each semester? ? is this a dumb question?