Which coordinate pair represents the reflection of poin A across the y-axis

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

What is the lcm of 16 and 40 ? 24 and 40 ?