Use the substitution method to solve the system of equations. Choose the correct ordered pair. 14x-2y=78 2x-2y=6

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

If the discriminant if a quadratic equation is 4 which statement describes the roots?

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?