Given angle 1 is congruent to angle 3 prove angle 2 is congruent to 3 are supplementary what is the missing reason for line 3 in this proof

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Solve: 3x+y=6 4x-2y=18 show all work !

If i have one apple and give you the apple, how many apples do i have?