Need a quick answer please

Which best explains why this triangle is or is not a right triangle?

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Formulate the indicated conclusion in nontechnical terms. be sure to address the original claim. the foundation chair for a hospital claims that the mean number of filled overnight beds is over 523, and she is therefore justified starting a funding campaign to add a wing to the hospital. assuming that a hypothesis test has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.