Atree casts a shadow 18 feet long, while a 6 foot pole casts a shadow 9 feet long. how tall is the tree?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.