Yesterday, Mr. Krissie ran 3 miles in 40 minutes, Is that a good pace for a half marathon (13.1 miles) with a cutoff time of 4 hours? Explain your answer.

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3