The total cost of a taxi consists of a mileage rate and an initial fee. A rider notices that at 4 miles the cost was $12.00 and at 6 miles the cost was $16.50. Which of the following
equations can be used to model the total cost of a taxi ride, y, as a function of length of
ride in miles, X?

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.