Question

James helped arrange painting for the art show.the first row of paintings had 15 paintings the second row had 18 the third row had 21. following this pattern how many painting we're in the eighth row

Answer 1

24 un the eighth row im sure of it because it adds my 3 each time if you look at the 1st row it says 15 then it adds by another 3 to 18 and then to 21

Answer 2

1=15
2=18
3=21

8-3=5
5*3 (3 is the difference) = 15
21+15=36

In the eighth row there is 36 paintings.