Question

Please answer my question I give thanks

Answer 1

N is a variable
1. N+4
2. dk
3. N*5
4. N-7
5. N^2 (N squared) +1
6. 3-N^2
7. N^2÷6=42
8. 2×N+5=20
9. 4×N-7=32
10. dk
11. 10+N÷2=-15
12. dk
some of them might not be correct, i did my best. i am sorry.