How to do a number line for a fraction

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Can someone me with the property questions for 12 13 and 14 plz

What is y-5=3(x+1) in slope intercept form