Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (–1 i) (21 5i)? (–1 i) (21 5i) 0 –1 (i 21) 5i (–1 21) (i 5i) –(1 – i) (21 5i)

Explain how earth is like a giant bar magnet. how is our magnetic field made?

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.

Match each fossil with the layer where it’ll be present based on those conditions.