Answer:
positive
Step-by-step explanation:
it is positive
2.9 per second
As we can see that common difference is increasing to one more digit after every term
so it means
a21 = 231
its the third one hope this helped on your NWEA test
10x + 30
10(x+3)
10 x X = 10x
10 x 3 = 30
