Answer:
There are 28 rows.
Step-by-step explanation:
Divide the amount of seats by the amount of seats in a row. (644/23=28)
Answer: The answer for this would be the rise over run. If you know what the rise over run expression is great. If not, here it is. The slope of a non-vertical line is the ratio of the amount it rises over some interval, over the length of that interval.
It is written like this rise/run.
Step-by-step explanation: Start from 8 and RISE (vertically) 4 places, the RUN (horizontally) and count until you get to -12. Then you take your numbers and divide.
Plug n = 1 into the expression 20-9n and we get
20-9n = 20-9*1 = 20-9 = 11
So 11 is the first term of the series that we add up. Therefore the answer must be choice C, which has 11 listed as the first term added
Step-by-step explanation:

all the details are in the attachment.