50% is 30, it’s half of 60. 25% is the same as dividing by 4, 60/4 is 15.
Each ratio is
3:1
3:1
3:1
3:1
For 
, put "
" for every value of "
".
w is the width and it is the independent variable. You can pick any positive whole number you want (within reason of course; you can't go to infinity or go beyond some set boundary). Whatever you picked for w, the expression 2w-5 will be dependent on it. So the length is dependent on the width.
For instance, if the width is w = 10 feet, then 2w-5 = 2*10-5 = 20-5 = 15 feet is the length. The choice of 10 feet for the width directly affects the length being 15 feet.
