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uma wanted to have a test average of 85%. On her first 7 tests she averaged 83% on her tests. what does she need to get on her 8th test to have an overall average of 85%

Sagot :

Answer:

99%

Step-by-step explanation:

83% * 7 tests = 581

[tex]\frac{581+x}{8} =85[/tex]

solve for x (the percentage needed on the 8th test)

x = 99%

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