I'm pretty sure it's below sea level because the trench is much farther down than the height of the mountain so if you were to find the middle it would have to be below sea level... I hope this helped :0
Which system of equations can the librarians use to model this situation?
Answer:
system of equations are
Step-by-step explanation:
Let x = number of children's books sold,
and let y = the number of adult books sold
The library sells 376 books at its annual used-book sale
so, we get equation as
Children's books cost $4
So, total cost of children book is 4x
adult books cost $7
So, total cost of adult book is 7y
so, we get total cost is 4x+7y
he sale takes in a total of $2119
so, we get equation as
so,
system of equations are