9) 2x+4y=22 2x-2y= -8
Mathematics, 02.11.2020 19:10, dondre54
Solve each system using elimination.
8) -x+5y=13 x-y=15
9) 2x+4y=22 2x-2y= -8
10) 4x-7y=3 x-7y= -15
11) 5x-y=0 3x+y=24
12) 6x+5y=39 3x+5y=27
Answers: 2
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Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables
Answers: 3
Solve each system using elimination.
8) -x+5y=13 x-y=15
9) 2x+4y=22 2x-2y= -8
9) 2x+4y=22 2x-2y= -8
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