Consider that an = 4n-1 represents a sequence. what is the tenth term?

I will start off this rule with 1 in place of n.
4(1) -1 = (4x1) -1, = 3. Your first term is 3.
Now we use 2 as n.
4(2) -1, = 8 -1, =7. Your second term is 7.
Use 3 for n.
4(3) -1 = 12 -1, =11. Your third term is 11.
Use 4 for n.
4(4) -1 = 16 - 1, = 15. Your fourth term is 15.
Use 5 for n.
4(5) -1, 20 - 1 = 19. Your fifth term is 19.
Use 6 for n.
4(6) -1, 24 - 1 = 23. Your sixth term is 23.
Use 7 for n.
4(7) -1 = 28 - 1 = 27. Your seventh term is 28.
Use 8 for n.
4(8) - 1 = 32 -1 = 31. Your eighth term is 31.
Use 9 for n.
4(9) -1 = 36 -1 = 35. Your ninth term is 35.
Use 10 for n.
4(10) -1 = 40 -1 = 39. Your tenth term is 39.
The tenth term is 39.
I hope this helps!

Cbottom left is the correct one.