Astationery store sold 320 of two different types of pens for $190.55. one type of pen costs 25 cents and the other costs 80 cents. how many 80 cent pens were sold? what is the value of the 25 cent pens sold?

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“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 .