Sarah can run 5 miles in 60 minutes. Find Sarah’s speed in minutes per mile.

d= r*t

d= 5 mi/hr * 5 min * (1/60) hr/min

= 5/12 mi

Notice how including the units makes it clear that you have divided when you should have multiplied.

Step-by-step explanation:

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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