Which operation should be done first to solve this problem? a subtract 3 from 15 b add -3 and 12 c multiply 5 and 15 or d none of these are correct

Use pemdas ( ) exponent multiply divide add and subtract

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .