Walid is four times as old as Sami . Five years ago, Walid was 7 times old as Sami . How old is Walid and how old is Sami ?​

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?