Answer:
brad paid more 
Step-by-step explanation:
15/12=1.25
and 12/8=1.50
so brad paid more on pizza
 
        
                    
             
        
        
        
21 times x to the fifth (where x is the ratio between values) equals 1240029
1240029/21=59049
59049^(1/5)=9
so the values are 21, 21*9, 21*9^2, 21*9^3, 21*9^4, 1240029
the sum of these values is 1395030
        
                    
             
        
        
        
Explanation:
Substitute:
3 for x
3 for y
1 for z
x(−y+z)
becomes:
3(−3+1)⇒
3 ⋅ −2 ⇒
−6
        
             
        
        
        
<span>If the radius of a circle is doubled in length, the circumference of the circle is also doubled in length</span>