Solve:3m-2(m-3)=1 please help

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

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Which of the following is the result of expanding the series