The ratio number of adults to students at the prom is 1:10. Last year there were 162 more students at the prom. If the school is expecting the same attendance this year,how many adults have to attend?

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To find the number of adults who need to attend the prom this year, we first need to determine the number of students at the prom last year.

Let's assume that the number of adults at the prom last year was A, and the number of students was S. We are given that the ratio of adults to students is 1:10, which means that A/S = 1/10.

We are also given that last year there were 162 more students at the prom than adults. Mathematically, this can be written as S = A + 162.

Now we can use these two equations to solve for the values of A and S.

First, we'll substitute the value of S from the second equation into the first equation:
A/(A + 162) = 1/10

Next, we'll cross-multiply to eliminate the fractions:
10A = A + 162

Simplifying the equation:
10A - A = 162
9A = 162

Dividing both sides by 9:
A = 162/9
A = 18

Therefore, the number of adults at the prom last year was 18.

Since the school is expecting the same attendance this year, the number of adults who have to attend this year will also be 18.

Hmm, if I'm correct maybe 16. That's what I think it must be.

I agree with Derpy Pegasus. If not, 17 adults