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
b = 2a - a
b = 2a - a
b = 2(0)
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(01.02 lc
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