Determine which of the following expressions requires combining like terms before it is considered to be in its simplest form. select all situations that apply.

4x + 3y - 7x
a^2 + a^2 - b
5y - x
a^2 + a^2b
-5w^2 + y - 4w^2 - 8y
(-1/2pq)(8pq)

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.

What is the radius of the cone in the diagram? round your answer to the nearest whole number