Are the ratios 2.5: 3.5 and 5: 7 proportional

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

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?