Find the missing length indicated

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?

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling