Highschool ! pls : )
find the root of the equation: (6x–1)(6x+1) - 4x(9x+2) = −1

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Ajar of gumballs contains 4 reds, 2 greens, and 6 blues. what is the probability of getting two blues in a row without replacement?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?