For the first one :)))))))
The sum of the angles of a triangle must add up to 180 degrees.
180 = 35 + 70 + x
180 = 105 + x
180 - 105 = x
75 = x
Option B is your answer.
Answer:
2
Step-by-step explanation:
The common ratio of the sequence is 2 because between each term you are multiplying by 2 to get the next term
Sum = n/2[2a + (n - 1)d] where a = first term, n = number of terms and d = common difference
(a) 30/2(2 x 5 + (30 - 1) x d) = 1455
10 + 29d = 1455 / 15
29d = 97 - 10
d = 87 / 29 = 3
(b) 7/2(2 x 9 + (7 - 1)d) = 0
18 + 6d = 0
6d = -18
d = -3
The answer to this question is 0.
Hope this helps :)
