Answer: the length of the base is 15 kilometers.
Step-by-step explanation:
formula : Area of parrallelogram = Length of base x height
Given: Area of parallelogram = 300 square kilometers
height = 20 kilometers
Substituting values in the formula , we get
300 = Length of base x 20
Length of base = 
= 15 kilometers
Hence, the length of the base is 15 kilometers.
Do you have a picture or some information of some sort?
For this case we have the following equation:

By completing squares we have:
Step 1:
Add
on both sides:

Step 2:
We rewrite the equation:

Step 3:
We solve the equation:

Solutions:

Answer:
the next line would be:

Answer:
The only common term is 33.
Step-by-step explanation:
We are given the following in the question:
Sequence 1:

Sequence 2:

Equating the two terms, we get,

Since, n cannot take a negative value, we get n = 4.
Thus, there is only 1 common term both the series have for n = 4.
Common term:

Thus, the only common term is 33.