Hey guys can y’all please help me ? Please and thankyou

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

Solve 30% of what = 60 step by step