Let 
denote the <em>k</em>th term of the sequence. Then
where <em>d</em> is the common difference between consecutive terms in the sequence and <em>a</em>₁ is the first term.
The sum of the first <em>n</em> terms is
From the formula for , we get
So we have 
, and 
so that 
.
Then the <em>n</em>th term in the sequence is
Answer:
The area is multiplied by 4
Step-by-step explanation:
The area of a circle is directly proportional to its square radius so if the radius is increased by x, the area will be increased by x ^ 2
Answer:
answer below
Step-by-step explanation:
7)x greater than or equal to 15
8) x is less than 96
Answer: 11 yards
Step by step: multiple 7 by 2 because you lost 7 yards in 2 days. You would get 14 yards back from the starting line of scrimmage, but you still need to add the 3 yards they gained leaving you with 11.
