Question 1045436
1.P=2L+2W
62=2W+2(4W+1)
  =10W+2
10W=60
W=6
L=25.

2.Let k represent Kelly. Then Laura is k+15, and Tia is 2k. So:
k+k+15+2k=83
4k=68
k=17
Kelly sold 17, Laura sold 32, and Tia sold 34.

3.Let b represent a base angle. Then the vertex angle is 4b-6. So
2b+4b-6=180
6b=186
b=31
4b-6=118. ☺☺☺☺