13. if 4/5 x blank=2/5 what is blank?​

What term best describes a line ans a point that lie in the same plane

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?