Acoin is flipped 18 times and it comes up tails 12 times. what is the experimental probability of the coin's comping up tails

What number should be added to both sides of the equation to complete this square? x^2-10x=7

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Andres wants to share 1/2 of his birthday cake with his friends. if he has 8 friends, how much of the cake will each friend recieve? draw a model to support your work (its ok if you cant)