Answer:
116
Step-by-step explanation:
13x-1 = 2(6x+4)
13x-1 = 12x+8
x=9
Let the difference between consecutive terms be D. If the middle term is 30, then the term before it is 30-D, and the term after it is 30+D. So the sum of these three terms would be (30-D) + 30 + (30+D) = 3*30.
Extending this sum to include all 11 terms centered around 30, we see that any addition of D is canceled by a balanced subtraction, leaving you with 11 copies of 30. So the value of the sum is 11*30 = 330.
Answer: 56
Step-by-step explanation:
The answer would be c or 35x4 + 17x3-3x2 +41x -8<span />
Answer:
Step-by-step explanation:
Law of cosines: c^2 = a^2 + b^2 − 2ab cos(C)
Used to find: the angles of a triangle when we know all three sides
We are looking for: Angle Q. The side opposite Angle Q (30) can be c. Line segments RQ and QS are a(17) and b(18).
30^2 = 18^2 + 17^2 - 2(17)(18) cos (q)