In triangle PQR points A B C are the midpoints of line PQ line PR and line RQ respectively

1. If BC = 7 then PQ = __

2. If QR = 12 then AB = __

3. If AC = 3x + 5 PR = 4x + 16 then PR = __

4. If AB = 7x – 4 QR = 3x + 14 then QC = __

5. If AB = 15 AC = 19 then QR + PR = __

6. If QA = x + 4PA =2x- 5 then BC = __

7. If QP = 20 QR =18 then BC + AB = __

8 . If QP +PR +RQ = 60 then BC +AC+ AB = __