Angle 6 is equal to which other two angles? ​

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

Taking algebra two apex courses and need with these questions

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7