7x²=28 i'm not sure about how to do thus problem

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

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x