izzyp619
26.01.2020 •
Mathematics
Atheater can seat 273 people. the number of rows is 8 less than the number of seats in each row. how many rows of seats are there?
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Ответ:
r = s - 8s = r + 8
r(r + 8) = 273
r^2 + 8r = 273
r^2 + 8r - 273 = 0
(r - 13)(r + 21) = 0
r - 13 = 0
r = 13
r + 21 = 0
r = -21extraneous solution...not ur answer
r = 13
s = r + 8 = 13 + 8 = 21
so there are 13 rowseach row containing 21 seats
Ответ:
L = 45°
Step-by-step explanation:
1. 82° + 53° = 135°
2. 180° - 135° = 45°
3. Angle L is 45°
I hope this helps.