By definition, a rectangle is a four-sided figure with four right-angle corners. which of these expresses this definition as a biconditional statement?

a .a quadrilateral is a rectangle iff it has four 90º angles.

b. once a quadrilateral has four 90º angles it has become a rectangle.

c. quadrilaterals are rectangles when they have four 90º angles.

d. a rectangle is a quadrilateral with four 90º angles.

What is x3+3x2−16x−48 divided by x−1?

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.

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.