Help I do not understand this 

△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 .

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?