Juan gets paid $13.75 for walking his neighbor's dog. This week he has walked the dog 7 times. Juan did such a good job that his neighbor gave him a $23.45 tip. How much money has Juan made?

Find the ratios of the corresponding sides

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.

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25