15 = -2 (2t - 1)
show work and explain

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

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?