Problema Solution
the average of paula's test scores must be 80 or better for her to receive at least a B or better in her biology class. If Paula scored 72 on her first test, what is the least she can score on the second test to recive a B for the class?
Answer provided by our tutors
two tests to consider, we sum their total and divide by two to obtain the average
let 'x' represent the score of the second test, we want an average of at least 80:
80<= (72+x)/2
160 <= 72+x
x >= 160-72
x >= 88
Paula must score an 88 or better in order to achieve an average of 80