At a school supply stołe, 5 packs of pencil and 7 packs of paper costs $22.25. At the same store, 8 packs of pencils and 2 packs of paper costs $14.90. How much is one pack of each?

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Me asap! what is the slope of this line? enter your answer in the box.

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?