Evaluate the following expression when x = 8

3(x) + 7

What is the sum of the first 8 terms of the geometric series

Which expression is the factorization of x^2+10+21

M∠abc=138° and m∠def=31° . which statement is true about ∠abc and ∠def ? a: the angles are neither complementary nor supplementary. b: the angles are complementary. c: the angles are supplementary.