Students sold 400 tickets to the spring band concert. the students sold adult and child (under 12 years old) tickets. each adult ticket was $5.00 and each child ticket was $2.00. the total amount of money earned from the sale of tickets was $1475. choose the correct set of equations.

a)

{5x+2y=1475
{x+y=400

b)

{5x+2y=400
{x+y=1475

c)

{5x=4002
{x=1475

d)

{x+2x=400
{y+5y=1475