What phrase describes the algebraic expression x-21.5

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

The product of sin 30 degrees and sin 60 degrees is same as the product of

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