The figure below shows a triangular piece of cloth: what is the length of the portion bc of the cloth ?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

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.

Which expression is rational? 6. , square root two, square root 14, square root 49