Select whether each function is linear or nonlinear. Linear

Nonlinear

y=9(2x)

y=(5x+3)2

y=8x2

y=5x−3

y=3x2+2x−1

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !