30 points HELP

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

(01.02 lc) angle abc has point e on ray ba and point d on ray bc. points e and d are equidistant from point b. to bisect angle abc, which of the following needs to be identified for the construction? the distance between points e and d the point in the angle that is equidistant from points e and d the endpoint of rays ba and bc the point outside of the angle that is equidistant from points e and d

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities