Which graph shows the solution for d?

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

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

Plz hurry evaluate the expression a+b where a=8 and b=19