Question

PLEASE HELP ME OUT!!!

Luna's retirement party will cost $630 if she invites 21 guests. What is the maximum number of guests there can be if Luna can afford to spend a total of $780 on her retirement party? Assume the relationship is directly proportional.

Answer 1

The maximum number of guests for $780 would be 26.

Explanation:

Write and solve an equation of ratios. In the first column write $630/$780; in the right column write 21/x:

630 21

---------- = -------

780 x

Cross-multiplying, we get 630x = 21(780), which yields x = 26.

The maximum number of guests for $780 would be 26.