In triangle ABC, J is on AB, K is on BC, and JK ll AC. Solve for x if JB = x+2, AJ = x+7, BK = 2x, and KC = x+9. (And I believe it has to be a proportion, I'm just not sure how I would format it) Thank you!

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Afootball is throw by a quarterback to a receiver

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true