[Question]: There are 50 children at the party. Three-fifths of them are boys. How many of the children are girls?
[Answer]: 50 x 3 / 5 = 30 children are boys. So, there are 50 - 30 = 20 children that are girls.
So the answer is 20.

[Question]: If Pete read twice as many books as Matt did last year, and this year he doubles that number while Matt reads only 50% more, how many books does Pete read across both years if Matt read 75 books in his second year?
[Answer]: First, we need to find the amount Matt read both years to establish what Pete read, so to find Matt's first - year total we multiply 75 / 1.5 = 50 books the previous year. Since Pete read twice as many books as Matt did in the first year, and Matt's first - year total is 50, this means Pete read 50 * 2 = 100 books his first year. Since Pete doubled the number of books he read the following year, this means Pete read 100 * 2 = 200 books the following year. We add the two years of Pete's reading together to find 200 + 100 = 300 books read in total.
So the answer is 300.

[Question]: It takes 40 minutes to freeze ice cubes and 3 minutes per smoothie to turn them into smoothies once they're frozen. How long does it take to make 5 smoothies?
[Answer]:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
First find the total time spend making the smoothies: 5 smoothies * 3 minutes / smoothie = 15 minutes. Then add that amount of time to the time freezing the ice cubes to find the total time spent: 15 minutes + 40 minutes = 55 minutes.
So the answer is 55.