The following are the choices on this question:
A.6
B. 39
C. 26
D. 12
The answer is option D. 12.
Check this out:
S=n² + n
S= 12² + 12
(you can get the square of 12 by multiplying 12 by itself: 12 × 12)
S=144 +12
S=156
Ratio- 3: 2
3x + 2x = 150
5x = 150
x = 30
3x is the larger number so plug in the x value with 30.
3x
3 x 30
90
The larger number is 90.
Hope I helped.. ^^
Answer:
Look below
Step-by-step explanation:
Sigma (summation) and Pi (product) notation are used in mathematics to indicate repeated addition or multiplication

Hope this helps
Answer:No
Step-by-step explanation:
They come out to different answers
Answer: 360 miles per hour…………………