Answer:
sn = d/2·n^2 + (a - d/2)·n
sn = (-4)/2·n^2 + (19 - (-4)/2)·n = -441
- 2·n^2 + 21·n = -441
- 2·n^2 + 21·n + 441 = 0
n^2 - 21/2·n - 441/2 = 0
use pq-Formula
n = -10.5 ∨ n = 21
only n = 21 makes sense. So n = 21 is the correct answer.
Answer:
3.5 po ang sagot
Step-by-step explanation:
have that then I have a a but this is
Answer:
First column 107
Second Column 135
Third Column 104
Fourth Column 109
Fifth Column 160
Is this what you were needing? A sum of the numbers in each column?
Please allow me to know if I helped by clicking thank you, rating or brainly.
Miss Hawaii
x = 15°
The angle of a straight line is 180°.
37 + 9x + 8 = 180
9x + 45 = 180
9x = 135
x = 15°