I need help with my homework pls​

The triangles are similar. what is the value of x? show your work.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.