Find a equation that passes through the point (4,-7) and has a slope of -3. I need this for a test and I need my work shown please help

After two years, how much has been paid into interest?

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?

Anyone know? will mark brainliest if correct