Zalmon walks 1/2 of a mile in 2/10 of an hour. What is his speed in miles per hour?
show your work

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?