Algebra

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
x
is the grade on the final exam and
y
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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