Elaine has 2 times as many stickers on her notebook as Maryam. Together, they have 15 stickers. How many stickers are on Elaine’s notebook?

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?