Answer: (Length/L, Width/W, Area/A)
1: L= 80 W= 20 A= 1600
2: L= 70 W= 30 A= 2100
3: L= 60 W= 40 A= 2400
4: L= 50 W= 50 A= 2500
5: L= 45 W= 55 A= 2475
Explanation:
I'll explain the first problem in detail: You have a perimeter of 200 and a width of 80. Perimeter is width+length+witdh+length, so first, we add 80+80 which equals 160. 200-160=40, 40 divded by 2 is 20. Ergo, the length is 20 and the width is 80, which would create this equation: 80+80+20+20= 200.
For area, all you have to do is multiply 80 and 20. 80 times 20 equals 1600, which means that 1600 is the area.
Hope this helps!