Mathias found the product as follows. Which of the following best describes his error? he did not multiply the denominators correctly. He did not factor the first numerator. He did not divide out the 2 from the 4 and the 8. He did not distribute the 5 to the terms in the other numerator.

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.