SOLUTION: Mike needs to earn a C and his intermediate algebra class. his current test scores are 65 70 78 87. in order to earn a C mikes average must be at least a 70 but less than 80 what

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Question 1050402: Mike needs to earn a C and his intermediate algebra class. his current test scores are 65 70 78 87. in order to earn a C mikes average must be at least a 70 but less than 80 what range of scores can Mike receive on his last test to earn a C in the course? express the range of interval notation.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
70%3C=A%3C80
70%3C=%2865%2B70%2B78%2B87%2BT%29%2F5%3C80
350%3C=300%2BT%3C400
50%3C=T%3C100
of in interval notation,
[50,100)