Two workers are each going to sew buttons on 10 shirts. how many buttons will they need in total?

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

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