Hello I need some help with my last Question pls..

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

Which best explains why this triangle is or is not a right triangle?