On n − {1}, the relation r given by a r b iff the prime factorizations of a and b have the same number of 2's. for example, 48 r 80 because 48 = 24 · 3 and 80 = 24 · 5. name three elements in each of these classes: 7, 10, 72.

Ineed with 14, 16, 28 and 36 me. we didn't go over them in class so i don't know what to do.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?