Let the number of rows be x
rows = x
seats in each row = x + 20
total seats = 1344
x (x + 20) = 1344
x^2 + 20x - 1344 = 0
(x + 48)(x - 28) = 0
x = -48 (rejected, answer cannot be negative) or x = 28
Therefore,
x = 28
x + 20 = 48
Check:
Row = 28
Numbers of seat per row = 28 + 20 = 48
28 x 48 = 1344 (Correct)
Ans:There are 48 seats per row
Your answer would be the time in takes for carbon-14 to elapse 3 half-lives.
5730 • 3 = 17190
Answer:
-4
Step-by-step explanation:
bro thats 6th grade math lol and its SO easy just need to try
