Which of the following sets of angles sum to 180°?
picture included, please help.

Which of the following vectors are orthogonal to (2,1)? check all that apply

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.

Mr. t has been dating his girlfriend for one year nine months and six days how many hours has mr. t been in a relationship