Solving for each equation:
A: True.

B: False.

C: True, given that y = 1

D: True, given that b = 6.66667

E: True.

Answer:
(A)
Step-by-step explanation:
The standard form of the equation of a circle is given as:

Simplifying the above given equation, we get




which is the required general form of the equation.
Hence, option A is correct.
Answer
an=a1+(n-1)d
Step-by-step explanation:
a2-a=9_2=7
a3-a2=16-9=7
a4-a3=23-16=7
a5-a4=30-23=7