The sum of Ymani and her mom’s ages is 54. If her mom is 30 years older than Ymani, how old is Ymani?

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?

If the average of x,y and z is 15 what is their sum