ydney exercises 4 times a week. She runs 3 1/2 miles each morning and bikes in the evening. If she exercises a total of 60 miles for the week, how many miles does she bike per evening?

11.5 miles

Step-by-step explanation:

Total 60 miles includes running and biking

Let's find total run time.

4 times a week for 3 1/2 miles per run, so that is:

4 * 3.5 (3 1/2 means 3.5) = 14 miles

Total Run = 14 miles

From 60 miles, she runs 14 miles. So biking is 60 - 14 = 46 miles

4 times per week, that means each time:

46/4 = 11.5 miles of biking each day

Hence,

she bikes 11.5 miles per evening