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Mathematics 16 Online
OpenStudy (anonymous):

The equation below is used to find G, a student's quarter grade in Mr. Gonzalez's math class. That grade is calculated by finding the sum of 80% of their quarter test average, t, and 20% of their quarter homework average, h. If Heather averages 85 on her homework, which equation can she use to find out what her test average will need to be in order to earn a quarter grade of 80?

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