Answer:
- 2
Step-by-step explanation:
Using the term- to - term rule of subtract 5
This means to find a term in the sequence, subtract 5 from the previous term.
Given a(1) = 13, then
a(2) = a(1) - 5 = 13 - 5 = 8
a(3) = a(2) - 5 = 8 - 5 = 3
a(4) = a(3) - 5 = 3 - 5 = - 2
The fourth term is - 2
The area is 18 square miles
-4 0 4 8 12 16 consecutive integers follow each other in a pattern
First we have to find the missing angle. And we know that sum of the measurement of angles of a triangle is 180.
So we will get

Now we use sine law, which is

Substituting the values, we will get


The formula of area of triangle, for the given triangle is

