Answer:
b.
Step-by-step explanation:
Answer:
Step-by-step explanation:
The nth term of an arithmetic sequence is given by the formula,
We were given that the 9th term is .
The sum of the first n-terms is given by the formula,
To find , we substitute , and .
The correct answer is D
M∠1 + m∠RPQ + m∠5 = 180° Definition of a Straight Angle
proof : mes1= PRQ (alternate interior)
RPQ = 3 Opposite angle (vertex)
5 =Q (alternate interior)
PRQ + RPQ + RQP = 180
312 is the LCM for this set