SOLUTION: An arithmetic student needs an average of 70 or more to receive credit for the course. She scored 76, 69, and 84 on the first three exams. Write a simplified inequality represent

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Question 370735: An arithmetic student needs an average of 70 or more to receive credit for the course. She scored 76, 69, and 84 on the first three exams. Write a simplified inequality representing the score she must get on the last test to receive credit for the course.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

Let x represent the score needed for the last test to average 70 or more

(76+69+84+x)/4 ≥ 70

(76+69+84+x)≥ 280

229 + x ≥ 280

x ≥ 51