There are 12 books on the shelf. 5 of these books are new. what is the ratio of used books to all books

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice