gerard is trying to prove that the diagonals in any parallelogram bisect each other. what is the best choice for the first line in his proof?
a) let ∠aeb be congruent to ∠dec.
b) let ac and bd be the diagonals of a parallelogram.
c) let point e be the midpoint of segments ac and db.
d) let de be congruent to eb and ae be congruent to ec.

Atriangle includes one angle that 72º. which pair could be the measures of the other two angles of the triangle? a. 9º, 9º b. 26º, 46º c. 53º, 55º d. 72º, 108º

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

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.