Help! Idk NOT know this will give crown

△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 .

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

F(x)=5/6x+3 which of the following is true