Write an equation for each linear function described.
The graph of the function passes through the point (2, 1), and y increases by 4
when x increases by 1.

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?

A+b= 17, ab=70, find the value of |a-b|

Find two numbers if their ratio is 4: 7 and their difference is 123.