triangle aed is larger than triangle abc by a scale factor of 5; we know this because side ed is 5 units and cb, the corresponding side in triangle abc, is 1. if ad has a length of 9, the length of ab must be 9 divided by five. thus, z is equal to 9/5 or 1.8.
In 2 2/3 months you ran 76 miles. To know how many miles you ran each month, you can simply use cross multiplication as follows: number of miles per month= (76) / (2 2/3) = 28.5 miles
