Answer: Second option.
Step-by-step explanation:
Let be "e" the number of easy puzzles Tina solved and "h" the number of hard puzzles Tina solved.
Set up a system of equations:

You can use the Eliminationn Method to solve this system of equations:
- Multiply the first equation by -30.
- Add the equations.
- Solve for "h".
Therefore, through this proccedure, you get:

Answer:
even number can be divided by two without areminder
Answer: 1120.70
Step-by-step explanation:
we have been asked to perform 
The given expression can be written as

Now it can be re-written as below
