Which of the following is a function of the nucleus 1. storage of DNA
2. controls most of the cells processes
3. contains the information needed to make proteins.
4. all of the above

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

b.have there own function.