For this case, the first thing you should do is take into account the irrational number definition.
An irrational number is one that can not be written as the quotient between two whole numbers.
Their number of decimals is unlimited and they are not periodic.
An irrational number within the specified domain is:
 π/2 = 1.570796327    
Answer:
an example of an irrational number that is less than 2 and greater than 1.5 is:
 π/2 = 1.570796327  
 
        
             
        
        
        
Answer: 220
<u>Step-by-step explanation:</u>
Children (x): $2
Teens (y): $3, 
Adults: (z): $5
Quantity: x + y + z = 570  ⇒  x +  + z = 570  ⇒ 1.75x + z = 570
 + z = 570  ⇒ 1.75x + z = 570  
Cost: 2x + 3y + 5z = 1950  ⇒  2x + 3 + 5z = 1950  ⇒  2x + 2.25x + 5z = 1950  ⇒  4.25x + 5z = 1950
 + 5z = 1950  ⇒  2x + 2.25x + 5z = 1950  ⇒  4.25x + 5z = 1950
Qty:    1.75x +  z =  570  →  5(1.75x +  z =  570)  →    8.75x + 5z = 2850
Cost: 4.25x + 5z = 1950 → -1(4.25x + 5z = 1950 → <u> -4.25x - 5z</u> = <u>-1950 </u>
                                                                                   4.50x        =   900
                                                                                           x       =    200
Teens (y):  
 
            y =  
 
              =  
 
              = 150
Quantity: x + y + z = 570   
               200 + 150 + z = 570
                      350     + z = 570
                                     z = 220
 
        
             
        
        
        
Answer:
No
Step-by-step explanation:
 =2•2•2=8
=2•2•2=8
 =3•3=9
=3•3=9
8≠9