Use the correct order of operations to solve the problem below. 8 × 9 + 12 ÷ 4 - (5 + 3)

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

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

Having a hard time understanding this question (see attachment).