How many times is the value of the ten thousand place greater than the value of the tens place

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.

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.

The value of x must be greater than what?