On the coordinate plane shown, each grid unit represents 10 feet. Polygon QRST has vertices Q(10, 10), R(−10, 10), S(−10, −20), and T(10, −20), and represents the floor plan of a room. Find the perimeter and area of the room.

There are 3 necklace and bracelet sets she can make .

Step-by-step explanation:

Since we have given that

Length of wire she used to make a necklace is given by

Length of wire she used to make a bracelet is given by

Total length of wire she is used  in all is given by

Now, we calculate number of necklace and bracelet sets she can make ,

So,

So, there are 3 necklace and bracelet sets she can make .