(-9a - 20c) - (-15a + 3c) - (-22a - 7c)
= -9a - 20c + 15a - 3c + 22a + 7c
= (-9a + 15a + 22a) + (-20c - 3c + 7c)
= 28a - 16c
Answer:
1.) -21
2.) 46
3.) 2
4.) -4
5.) -10
6.) 10
Step-by-step explanation:
Answer:
30240 number of ways are there to seat them
Step-by-step explanation:
Total number of ways of arranging 9 people on 9 chairs in circular manners = (9-1)! = 8! =
number of ways A sit always sit next to B = AB together makes a single and
therefore total number of arrangements for this = 7+(AB) = 8 that is 8 persons sitting in circular manner
number of ways = (8-1)! =7! = 5040
likewise number of arrangements for A and C will be = 5040
Total number of ways such that A cannot sit next to B or C = total ways of 9 persons - total number of A always sitting next to B - total number of ways always sitting next to C = 8! - 7!-7!
= 40320- 5040-5040
= 30240
=
Answer:
90
Step-by-step explanation:
Remeber there are 180 degress in a right triangle.
Answer:
31 miles
Step-by-step explanation:
The bottom of the stratosphere is around 10 km (6.2 miles or about 33,000 feet) above the ground at middle latitudes. The top of the stratosphere occurs at an altitude of 50 km (31 miles).
-Hope this helps-
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