True or false? it is possible to circumscribe a circle about the quadrilateral below.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Find the nonpermissible replacement for binthis expression.b2/5b +5

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )