Definition
An irrational number is a number that cannot be expressed in as a fraction. It has decimal expression that does not terminate.
An example will be √2.
Reason:
(1) √2 cannot be expressed as a fraction form
(2) √2 has decimals that does not terminate
4.28 is your short answer but your complete answer is 4.28571428571
For this case we have that each student takes 8 \ frac {3} {4} minutes to perform and play 3 songs. Then, we convert the mixed number to a fraction:

Thus, each student takes
minutes.
If there are 9 students in the recital then we have:
minutes.
Thus, the recital lasts at least 78.75 minutes.
Answer:
The recital lasts at least 78.75 minutes.
Answer:
72
Step-by-step explanation:
48÷2= 24
48+24= 72
Hope this helps! :)