12 Select the correct expressions.
Identify the equivalent expressions of 4(2x + x - 3) - 3x + 3 by substituting x= 2 and x= 3.
9x -9
9x - 1
9x + X-9
9(x - 1)
4(3x – 3) + 3 - 3x
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On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.