Express the radical using the imaginary unit, i.
Express your answer in simplified form.

+/-√-9

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality

Find the domain of the following expression: 1/(√x)-2