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Since Square Roots must be greater than or equal to three, just add three to the square root to make it be greater than or equal to negative 3
Remember, the graph of a line represents every point that is a possible solution for the equation of that line. So when the graphs of two equations cross, the point of intersection lies on both lines, meaning that it is a possible solution for both equations. When the graphs of two equations never touch, there are no shared points and there are no possible solutions for the system. When the graphs of two equations lie on top of one another, they share all their points and every one is a possible solution.
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Answer: False
Explanation:
By definition, the z-score of the random variable, x, is

where
μ = the population mean
σ = the population standard deviation
Because only the sample mean and the sample standard deviations are known, we cannot calculate the z-score. Instead, we can calculate the Student t-test statistic.