For the school play, most of the chairs are rows of 10 each, with one row of 8 chairs. if there are 78 chairs in altogether, how many rows are there?

U have 78 chairs...

there is 1 row of 8that now leaves 70 chairs
70/10 = 7 rows of 10

so u have 7 rows of 10 and 1 row of 8 for a total of 8 rows with 78 chairs.

“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 .