Answer:
50=2(10)+2(w)
Step-by-step explanation:
The perimeter is all of the sides added together, so it is L+L+W+W
We know the length is 10, so we substitute 10 for L to get 10+10+W+W
2 tens is 2 times 10 & 2 Ws is 2 times W
50=2(10)+2(w)
In this case, w is 15
Hope this helps :-)
