How many numbers lines comprise the basic parts of a cartesian coordinate system

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Me i'm timed right now! a. (0,-5)b. (0,-3)c. (0,3) d. (0,5)

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.