Which set of pairs does not represent a function

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Anumber is equal to twice a smaller number plus 3. the same number is equal to twuce the sum of the smaller number and 1. how many solutions are possible for this situation

3. simplify. 312⋅312 4. rewrite n√xm using a rational expression.