Please Help!! What is B - CF?

What is the area of the shaded sector?

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis