Answer:
Arithmetic sequence states that a sequence of numbers such that the difference between the consecutive terms is constant.
it is given by:
where a is the first term , n is the number of term and d is the common difference.
Given the series: 
here, Common difference(d) = 5
First term(a) = 49
by definition we have;
For nth term

= 5n + 44
To write the series using summation notation for 14 terms
Summation symbol 
The series for 14th terms is given by;

Answer:
The slope is -1/4
Step-by-step explanation:
perpendicular line is 
Is there any picture we can work with?
Answer:
54
Step-by-step explanation:
4x11-(17) 4x11-(17)
44-17 44-17
27 + 27
54