Which of the strategies would eliminate a variable in the system of equations? -X + 6y = 8
7x - y = -2
Choose all answers that apply:
A
Add the equations.
B
Multiply the top equation by 7. then add the equations.
C
Multiply the bottom equation by 6. then subtract the bottom equation from the top equation.
PLEASE HELPPP

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.