A student in a Pre-Calculus class has test scores of 70, 73, 61, and 79. The final exam is worth 2 test grades.
Write a linear equation that models this problem, where
is the grade on the final exam and
is the student's grade in the course.
What grade is needed on the final to earn a B (average score of 80%)?

Anyone know how to do this???

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  1. the grade is just the weighted average of all the test scores.
    The final is counted twice, making 6 scores to average
    y = (70+73+61+79+2x)/6
    so to get a B, find x where
    y = 80
    and round up.

    Judging from the test scores, I don't see much chance of getting that B :-(

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