Which algebraic expression means “three more than a number squared”? 2 n + 3 2 n minus 3 n squared + 3 n squared minus 3

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

In a column proof the right column states your reasons

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?