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Mathematics 13 Online
OpenStudy (anonymous):

Izzie recently took a math test where each correct answer (a) was worth 7.8 points. She also correctly answered a bonus question worth 14 points. Using the equation 7.8a + 14 = 84.2, how many questions on the test did Izzie answer correctly? A. 13 B. 6 C. 10 D. 9

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