Answer:
Step-by-step explanation:
whole number   No
integer   No
rational
:  No, because pi is irrational.
irrational:  YES.  π/2 is the ratio of pi to 2, BUT pi is irrational.
 
        
             
        
        
        
12+8y you have to do like terms and the distributive property of 2(y+1)
        
             
        
        
        
Rate of 3 every 10 minutes.
In 10 minutes there are 3 buses.
In  1 minute    it is        (3/10).     For 1 hour = 60 minutes.
For 60 minutes  =  3/10  * 60  =  18.
18 buses.
        
             
        
        
        
Answer:
a) 910
b) 828100
c) 144320
Step-by-step explanation:
 a. ∑y 
This is the sum of all values of y. So

 b. (∑y)^2 
This is the square of the sum, so the square of 910, that we found in the previous item.
910² = 828100
 c. ∑y^2
This is the sum of the squares of each amount spent. So

 
        
             
        
        
        
The answer is 54 because you add them