Jai was solving the system of equations below when something strange happened. y = -2x +
2y + 4x = 10
a. Solve the system. Explain to Jai what the solution should be.
b. Graph the two lines on the same set of axes. What happened?
c. Explain how the graph helps to explain your answer in part (a).

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.