Write and solve the equation and then check your answer. Write and solve the equation and then check your answer.

The difference between a number and four hundred forty is five hundred eighty-five.

Complete the statements.

The equation that correctly models the problem is
.
To undo what has been done to the variable,
both sides of the equation.
The solution of the equation is
.
Check the solution by substituting
for the variable and simplifying.

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.