Answer:
x=26
Step-by-step explanation:
The sum of all angles in a triangle is equal to 180
x + 55 + (4x-5) = 180
Combine like terms
5x +50 = 180
Subtract 50 from each side
5x +50-50 = 180-50
5x = 130
Divide each side by 5
5x/5 =130/5
x =26
The formula is a subscript n = 6^n
Where a1 is the first term and d is the common difference of the sequence
Thus, the first term is 6, second term 36, then 216.....
thus the sequence is, 6, 36, 216, .....................
Therefore, this is a geometric sequence with a common difference of 6
Answer:

Step-by-step explanation:
Since it is -1, put 1/something
7y+2(5y-9)=16
7y+10y-18=16
17y=34
y=2
5(2)-9=x
10-9=x
x=1