на прямой AB взята точка C так, что AC:AB=9:7. Чему может быть равна длина отрезка BС, если АС=36

1.USE PAST PERFECT CONTINUOUS TO COMPLETE THE SENTENCES. .1Her eyes were red .It was clear she (cry).2.Mrs Thompson (wait) for 3 guartdrs of an hour defore hue secretary came.3.JANE was tired.She (do) her room since afternoon.4.Alec said he (stand) there since 6 o'clock.5 jill (study) english for five years defore she visited the USA .5.it was late at night when he realized that he (work) with computer for 5 hours.

как перевести нарусский \\sparky\\

какая часть речи укажите через терэ--
тройка, тройной, втроём,три, утроить, трижды, трое , треугольник