Which equation have the same value of × as 3/5(30×-15)=72 check all that apply

18x-15=72
50×-25=72
18×-9=72
3(6×-3)=72
18×=81
18×=63
×=3.5
×=4.5

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?