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A class of 18 students took a math test. Seven students had an average of 90. The other students had an average of 82. What is the average for the whole class? Round to the nearest whole percent. A) 80
asked
May 16, 2017
Mathematics
high-school
2
answers
5
votes
168k
views
I NEED HELP!!!! Given the table below, what is the chemical formula for a compound between Na and the sulfate ion SO4 -2? A. nitrate ion NO3 -1 B. phosphate PO4 -3 C. sulfate SO4 -2 D. acetate C2H3O2 -1
asked
Apr 13, 2017
Chemistry
high-school
2
answers
4
votes
63.2k
views
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