Which undefined terms are needed to define parallel lines

What is the greatest common factor of 8 and 36

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"