Physics: each of two or more atomic nuclei that have the same atomic number and the same mass number but different energy states.
chemistry: each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.
X+y=38 that’s your answer
Terrance: 12 miles/1 hour
Jesse: 8 miles/1 hour
19 days are left in a year because 1 week=7 days which means 2 weeks=14 days 14 +5=19
