The ratio of female teachers to male teachers is 5 to 4 there are 54 teachers at the school how many teachers are female

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

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

What is the value of x when x + 7 = 21?