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To obtain a grade A, Patrick must score an average of at least 70 on five tests. If his average mark for the four tests is 68, what is the lowest mark he can get on his fifth test and still obtain a grade A

Correct answer:

x =  78

Step-by-step explanation:

 70 = 54 68+x  5 70=4 68+x  x=78  x=178=78  x=78



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Showing 1 comment:
Math student
1/2x = -17/18





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