It is 7.4
19.55 rounded to the nearest tenth would be 20, the reason for this is because: 1|9| .55 - As you are rounding to the nearest ten, you would look at the value in this location, if it is 5 or higher, then it has to be 20, however if this value is 4 or lower, the nearest tenth would be 10.
19.6
55.0
55.0
38.46 is 38.5 to the nearest tenth. 1.2 is already at the nearest tenth
The answer is 7.4
55.0
55.0
3.3
The answer will depend on x.
5.49 rounded to the nearest integer is 55