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Rock On!
9 The Composites and Square Roots play sold-out concerts at Patriot Park and Copper State Arena. How many tickets were sold for these two concerts?
10 The bands sell all but 500 tickets for an 8:00 P.M. concert at Badger Arena. At 7:30 P.M., 18,777 people have arrived. How many people are not yet at the arena?
11
a. The bands play a sold-out concert at Minutemen Center. At 7:00 P.M., 11,456 people are in the arena. At 7:30 P.M., 6,845 more people have arrived. How many people have not shown up?
b. Everyone has finally arrived at the concert at Minutemen Center. After the Square Roots play, 4,219 people leave their seats to buy refreshments or souvenirs. How many people are still in their seats?