Preston has b buttons. bobby has 83 more buttons than preston. write an expression that shows how many buttons bobby has.

type an asterisk ( * ) if you want to use a multiplication sign and a slash ( / ) if you want to use a division sign

If square root x = -7, then x= -49 true or false

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

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv