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lara [203]
3 years ago
6

I need help on 5 please help fast

Mathematics
2 answers:
djyliett [7]3 years ago
8 0
 the correct answer is 83.

yyyyyeeeeeeaaaahhhhhh bbbbooooiii
marysya [2.9K]3 years ago
6 0
The equation you would use is 
mean= Test1+test2+test3+test4+test5+Test6+x/Total number of tests

so 83=89+78+69+81+89+90+X/7
First mutiple both sides by 7 so 
581=496+X
you then substract the 496 and get 85
so she would need a 85 on the 7th test
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