Mathematics, 28.08.2019 20:30 Thania3902

(20 points)
josephine is taking a college course, and her professor bases the course grade on the average of 2 tests taken in the semester. she wants to know what she needs to earn on the last test to maintain her grade. rearrange the following equation for b, where a is the average of 2 test scores, a and b.
a = a + b over 2
b = 2a + a
b = 2a − a
b = 2a(a)

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