How many more unit tiles need to be added to the expression x2+4x+3 in order to form a perfect square trinomial? 1 2 3 4.

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

Essay questions may also be referred to as a. talk questions c. hard questions b. explain questions d. think questions

Blank is the amount of energy in a sound wave per unit of time and is also related to the loudness of a sound