Answer:
$10
Step-by-step explanation:
The hardcover books are $12 each which would be $60 out of the $100. There are four more paperbacks meaning they would be $10 each and cost $40 total. 
I hope this helped!!! :)
 
        
             
        
        
        
Answer:
C. Plane  
Step-by-step explanation:
One definition of a circle is: "It is the set of all points in a plane that are at a given distance from a fixed point."
The undefined term is the word "plane."
You could define a plane as a flat surface with zero thickness and extends infinitely in all directions, but it isn't in the definition of a circle.
Euclid defined a plane as "a surface that lies evenly with the lines on it" before he defined a circle, so the meaning was understood.
A, B, and D are wrong. They aren't mentioned in the definition.
 
        
             
        
        
        
Answer:
yes
Step-by-step explanation:
The difference in the cost per pound is $6.
For 12 lb, the total difference in $6 × 12 = $72.
If the Fresh Market is close enough and you have the time, it is worth the drive since you will save $72.
 
        
             
        
        
        
5: AA  47=47    36=36  similar 
6: SSS   32/16 =2,  24/12 =2,  9/4.5 = 2  similar    
7: SAS  72/53= 1.3,  55=55, 48/12 = 4  not similar
8: SAS  45/15= 3,  54=54,  9/3=3  Similar
9.SAS  20/10 =2,  10/8 = 1.25  not similar
10.SAS  32/14= 2.29, 46=46,  12/7= 1.79  not similar