SOLUTION: A student needs an average of 70 or more to pass a course. He scored 82, 80, and 87 on the first three exams. Write an inequality representing the score she must get on the last te

Question 265212: A student needs an average of 70 or more to pass a course. He scored 82, 80, and 87 on the first three exams. Write an inequality representing the score she must get on the last test to receive credit for the course.
Help! I can't figure this out.
Found 2 solutions by stanbon, rfer:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A student needs an average of 70 or more to pass a course. He scored 82, 80, and 87 on the first three exams. Write an inequality representing the score she must get on the last test to receive credit for the course.
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Let the last test score be "x".
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Equation:
(82+80+87+x)/4 = 70
249+x = 4*70
x = 280-249
x = 31 (score she need on the last test to pass with an average of 70)
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Cheers,
Stan H.
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
(82+80+87+x)/4=70
249+x/4=70
249+x=70*4
249+x=280
x>31
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