You talk on the phone y minutes on a day x of every month according to the equation y=2x+1. the cellphone company claims you talked 12 minutes on the phone on the fourth day of the month. are they right?

No they are not , y= 2(4)+1 is 9 not 12

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .