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

Three times the difference of federico’s age, and 4, increased by 7, is greater than 37. what are possible values of federico’s age?

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.