Answer:b=5
Step-by-step explanation:the formular for pythagoras theory is 
C^2=a^2+b^2
13^2=12^2+b^2
169=144+b^2
Collect like terms 
169-144=b^2
b^2=25
Take the the square root of both sides 
b=square root of 25 
b=5
 
        
             
        
        
        
Ans: 0.
2/3 = 0.666......
so the whole number is 0. 
        
             
        
        
        
Answer:
4 : 18, 8 : 36
Step-by-step explanation:
We multiply to find equal ratios.
2 x 2 = 4
9 x 2 = 18
4 x 2 = 8
18 x 2 = 36
We get 4 : 18, 8 : 36.
 
        
                    
             
        
        
        
"of" means multiply      and         "is" means equal
1.  x = 14
x = 14
                                 x = 14(3)      <em>multiply both sides by 3 to isolate "x"</em>
                                 x = 42
2.  x = 14
x = 14
                                 x = 14(5)      <em>multiply both sides by 5 to isolate "x"</em>
                                 x = 70
3.  x = 14
x = 14
                                 2x = 14(5)      <em>multiply both sides by 5 </em>
                                 2x = 70
                                   x = 35         <em>divide both sides by 2 to isolate "x"</em>
4.  x = 14
x = 14
                                 7x = 14(8)      <em>multiply both sides by 8 </em>
                                 7x = 112
                                   x = 16         <em>divide both sides by 7 to isolate "x"</em>
Answers: 42, 70, 35, 16