I answered a question correctly and someone deleted my answer without giving me any explanation. I don't know why someone would do that but its really rude. Like someone is trying to help others and you are deleting their answers. What is this??

This has happened to me more than you can count. Usually it's because ofs policy. If the question or answer is not academically related, or you copied from another source, they'll most likely take it down. But I understand where you're coming from. Sometimes they take it down for no reason! I don't know why they do this, but I am not a big fan of it >:((

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.

i dont understand the question? ?

step-by-step explanation: