Solving to step Equations: Chuck is making a sand box for a park. He knows the width of the sandbox is 3 1/2 feet long, and the perimeter is 16.5 feet. What us the length of the sandbox?( please use variables)

Question

Solving to step Equations: Chuck is making a sand box for a park.  He knows the width of the sandbox is 3 1/2 feet long, and the perimeter is 16.5 feet. What us the length of the sandbox?( please use variables)

anonymous · Answer

sandbox= square or rectangle. 
so 3.5+3.5= 7 
16.5-7=9.5 
9.5/2=4.75 or 4 3/4 feet.

anonymous · Answer

You can just write it out word by word:

length times 2 plus width times 2 equals perimeter
2l+2p = perimeter
then just plug in your numbers for length and perimeter and use algebra to solve

radar · Answer

You want variables.  Then let l= length of sandbox. (variable l)  The width is given w=3.5 ft.  You also know the perimeter is P=2l + 2w   Plug in known and variable.
16.5=2(l)+2(3 1/2)
16.5=2(l) + 7
2(l)=16.5-7=9.5 ft
l=9.5/2=4.75   length is 4.75
Now check. 2(4.75)+2(3.5)=16.5 ft.
9.5+7+16.5
16.5=16.5   It checks out.

radar · Answer

Did you follow that with understanding?