Name the place value to which each number was rounded.0.546 to 0.55

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

Ihonestly have no clue if it's each or none.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.