Question

(5)

I used the triangle-angle-bisector theorem to do 7.2/19.3 = 3.9/x, then I cross multiplied and got 75.27 = 7.2x and x = (roughly) 10.45, rounded to the nearest tenth is 10.5

Answer 1

Yes this is correct. Nice job.

An alternative equation is x/3.9 = 19.3/7.2 which leads to the same answer.