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Say the number of adult tickets is x. That means the number of student tickets is 71 less, making it x - 71.
We can add the number of student and adult tickets, because we know their sum is 479.
x + x - 71 = 479
Now, we solve for x.
2x - 71 = 479
2x = 550
x = 275
So, there were 275 adult tickets sold.
ANSWER
The set of all rational numbers and the set of all real numbers.
EXPLANATION
The set of rational numbers contains all numbers that can be written in the form,

where a and b are integers and b≠0.
The given number is

It belongs to the set of rational numbers.
The set of rational numbers is a subset of the set of real numbers.
Hence

also belongs to the set of real numbers.
The correct answer is A.
Answer:
Width = 18 feet
Length = 43 feet
Step-by-step explanation:
Width = x
Length = x +25
Perimeter = 122 feet
2 * (length + width) = 122
2 * (x+25 + x) =122
2x + 25 = 122/2
2x +25 = 61
2x = 61-25
2x = 36
x = 36/2
x = 18 feet
Width = 18 feet
Length = 18 + 25 = 43 feet