How many different ways can 4 tickets be selected from 50 tickets if each ticket wins a different prize

Find the zeros of the function. write the smaller solution first, and the larger solution second f(x)= (x+6)^2-49

Suppose a ball is dropped fromca height of 6ft. it bounces back up but time it bounces, it reaches only 7/10 of its pervious height. what is the total of each height that the ball reaches after 5 bounces

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class