I need advice. So I haven't been getting that many good grades in math lately even though i know the info. Its like when its time to use it on homework or a test my brain just wont process it. And I have always been the one my parents never had to fuss at about grades and I dont want them to be disappointed in me

4sentences over a chronicle of a teen killer

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.

Rick is on a bicycle trip. every 4 days he bikes 230 km. if rick keeps this same pace for 16 days, how many kilometers will he bike?