can someone answer this po sana may makasagot po plsss

Answer:
4-5. x=14
(x+7)2=x(3)
2x+14=3x
14=3x-2x
14=x
6. EC=3
BC*AC=DC*EC
4*12=16*EC
48=16EC
48/16=16EC/16
3=EC
7.BC=3
BC*AC=DC*EC
BC*24=18*4
24BC=72
24BC/24=72/24
BC=3
WALA FIGURE SA C ASAN?