Mark M. answered 06/07/16
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
an = a1 + (n - 1)d
-74 = 38 + (17 - 1)d
-74 = 38 + 16d
-112 =16d
-7 = d
Use the same formula to determine a27.