Answer: (a) a = 3, and d=
(b) 
Step-by-step explanation:
Since we have given that
Arithmetic sequence be

As we know that
a denotes the first term.
d denotes the common difference.
So, 
Hence, a = 3, and d=

Hence, (b)

Answer:
Step-by-step explanation:
Join line EG with a straight edge.
Put a point in the middle of the circle.
Call it O.
GO and EO form a central angle.
GOE = 120 degrees
Any point on the circumference of a circle that is on the same side of EG as the peak of the central angle = 1/2 the central angle. It's much easier to do this with an example
Arc EOG = 120 degrees. The Central angle = the arc.
EFG = 1/2 EOG
EFG = 1/2 120
EFG = 60
11x + 5 = 60 Given
-5 -5 Subtract 5 from both sides.
11x = 55 Divide by 11
x = 55/11
x = 5
Angle 3 is on a straight line to angle 2, which means that they add up to 180°. Therefore, 180 - 117 = 63° which is your answer. I hope this helps!
Answer:
{1,2,3,4}
Step-by-step explanation:
cant be zero, also got it right on edge 2020