Answer:

Step-by-step explanation:
The opposite of 41 is -41
Answer:
the 3rd one
Step-by-step explanation:
Answer:
7 acres a day
Step-by-step explanation:
6x7=42, so if they planted 42 trees in 6 days, the 7 is the only number left.
Therefore, (drumroll please)
7!
Answer:
A. Zero
Step-by-step explanation:
This would have no solution because when you try to solve the equation and simplify, the 4x's cancel out, leaving no variable and making the equation reduce to: -8=9 which is false, and therefore, this has no solution.
I hope this helps!