Expand the following:2(x+3)

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?

The formula to determine energy is e=1/2mv2? what is the formula solved for v?

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.