if is the sum of the second and seventh term of an Arithmetic progression is 25 and the 5th term is 15. Find the common difference

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

If square root x = -7, then x= -49 true or false

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?