You have a gift certificate to a book store worth $80. each paperback books is $6 and each hardcover books is $12. you must spend at least $25 in order to use the gift certificate. write and graph a system of inequalities to model the number of each kind of books you can buy. let x : the number of paperback books and y : the number of hardback books.

Step-by-step explanation:

The two angles shown are considered "alternate interior angles" because they lie on the INSIDE of two parallel lines, but on alternate/opposite sides of the transversal line. Alternate interior angles are congruent. You can use transformations to see that they are congruent. Therefore, you should set the two expressions equal to each other and solve for x.