Abus on a regular schedule takes 3  1⁄4hours to reach its destination. the express bus takes 2  1⁄2  hours to make the same trip. how much travel time can be saved by taking the express?  

What is the sum of these mixed numbers 2 1/8 + 4 3/8

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.