Type the correct answer in each box Use numerals instead of words. Consider the sistems of equations below Determine the number of real solutions for each system of equations. real solutions System A has real solutions System B has real solutions System Chas

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Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12