What is the slope of a line parallel to the line who se equation is 6x -3y= 63

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −

Is the number 128.439 a rational number