Answer: where is the quadrilateral
Step-by-step explanation:
The answer would be D. It would be $42 in the end if you picked D.
This problem is an example of an arithmetic series.
The common difference of the second term (15) with the first term (9) and the third term (21) with the second term (15) [15-9=6; 21-15=6] is 6.
The formula for solving this is:
An= A1 +(n-1)*d where An is the nth term, A1 is the first term, n is the number of terms and d is the common difference.
An=9+ (31-1)*6 = 189
The answer is 189.
(5 x 10) + (8 x 1) + (8 x 0.1)
OR
50 + 8 + .8
Fifty-eight and eight tenths
Hope this helped!
