Answer:
The sum of the first twenty-seven terms is 1,188
Step-by-step explanation:
we know that
The formula of the sum in arithmetic sequence is equal to
where
n is the number of terms
a1 is the first term
d is the common difference (constant)
step 1
Find the common difference d
we have
n=7
a1=-8
S=28
substitute and solve for d
step 2
Find the sum of the first twenty-seven terms
we have
n=27
a1=-8
d=4
substitute
Answer:
B. (x - 2)^2 + (y - 1)^2 = 9.
Step-by-step explanation:
The general equation for a circle can be written as:
(x - a)^2 + (y - b)^2 = r^2 where the centre is at (a, b) and the radius= r.
Here a = 2, b = 1 and r = 3 so the answer is:
(x - 2)^2 + (y - 1)^2 = 3^2
= (x - 2)^2 + (y - 1)^2 = 9.
Answer:
A=45 B=58 C=77
Step-by-step explanation: