Which of the following is not a characteristic of non-euclidean geometry? . a.. space is saddle-curved.. b.. the sum of the angles in a triangle is always 180.. c.. the parallel postulate is false.. d.. there are no straight lines.

Simonne used the following steps to simplify the given expression. 12-3(-2x+4) step 1: 12+(-)+(-3)(4) step 2: 12+6x+(-12) step 3: 12+(-12)+6x step 4: 0+6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? •identity property of addition •inverse property of addition •associative property of addition •commutative property of addition