Question 8 of 14
2 points
what is the sum of the arithmetic series of odd numbers below?
1+ 3 + 5 + + 23

!

144.

Step-by-step explanation:

Sum of n terms = (n/2)[a1 + l]    where a1 = first and l = last term.

There are ( 1 + 23) / 2 = 12 terms in this series.

So  the sum = (12/2) [ 1 + 23]

= 6 * 24

= 144.

though don't really understand the question

Step-by-step explanation:

i would say

y= nx

y=180

so 180=n5

divide both sides by 5

180/5= 36

the answer is D= 36