Answer:
Total 10
Step-by-step explanation:
21. 23, 25, 27, 29, 31 , 33, 35, 37, 39.
hope this helps you
I think the answer would be 6.5
Answer: 11
c(4)=-7+6(4-1)
c(4)= -7 + 6(3)
c(4)= -7 +18
c(4)= 11