Mark and Tony have a total of 121 baseball cards. Tony has 5 more than three times Mark's amount. How many cards does Mark have?

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

Which of the following is an example of conditional probability