When y=5y=5, 12+4y=12+4y

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The statements below can be used to prove that the triangles are similar. ? △abc ~ △xyz by the sss similarity theorem. which mathematical statement is missing? ∠b ≅ ∠y ∠b ≅ ∠z

What is the angle measure, or angle of depression, between this bird and the bird watcher?