SOLUTION: a student has grades of 76,84,73 and 88 of four of the five unit tests in a course. let x represent the grade on the fifth test. this must be a whole number. an average of more tha
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Question 213736: a student has grades of 76,84,73 and 88 of four of the five unit tests in a course. let x represent the grade on the fifth test. this must be a whole number. an average of more than 80 is desired.
a)write an inequality using x to represent the fifth test
b)solve the inequality
c)what is the lowest grade the student needs in order to have an average of more than 80.
Answer by user_dude2008(1862) (Show Source): You can put this solution on YOUR website!
a)
(76+84+73+88+x)/5 > 80
b)
(76+84+73+88+x)/5 > 80
(321+x)/5 > 80
321+x > 80*5
321+x > 400
x > 79
solution: x > 79
c)
Lowest grade is 79.
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