The ratio of boys to girls at a dance was 9 to 5. How many girls were at the dance if there were 72 boys at the dance?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Which representation has a constant of variation of -2.5

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.