Aclass has 9 girls and 12 boys what is the probability of the teacher randomly calling on a boy?
3/4
4/7
3/7
4/3
tysm!

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Which is the completely factored from of xy^3-x^3y