How can you tell if radicals are like radicals

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

Landon wrote that 3−2.6=4. which statement about his answer is true?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.