Please help ill
mark u as brainlest

Which of the following are accepted without proof in a logical system? check all that apply.

What is the value of the expression below? 148+(-6)| + |– 35= 7|

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)