In a plan for area codes, the first digit could be any number from 4 through 9, the second digit was either 0 or 4, and the third digit could be any number except 0. With this plan, how many different area codes were possible?

Which ahows the graph of the solution set of 6x+4y< 12

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.