What is this decimal expressed as a percent?

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

△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 .

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?