Answer:
it’s not proportional 
Step-by-step explanation:
the number that you are always multiplying should be constant
2x9 = 18 but 4x9 does not equal 20 
 
        
             
        
        
        
Answer:
If your install Bratleby on your device, It will help you with this. But you will have to put in an email. and it will give 10  questions to answer for free. Sorry that I cannot help you with this.
Step-by-step explanation:
 
        
             
        
        
        
1. Given any triangle ABC with sides BC=a, AC=b and AB=c, the following are true :
       i) the larger the angle, the larger the side in front of it, and the other way around as well. (Sine Law) Let a=20 in, then the largest angle is angle A.
       ii) Given the measures of the sides of a triangle. Then the cosines of any of the angles can be found by the following formula:       

2. 

3. m(A) = Arccos(-0.641)≈130°, 
4. Remark: We calculate Arccos with a scientific calculator or computer software unless it is one of the well known values, ex Arccos(0.5)=60°, Arccos(-0.5)=120° etc
 
        
        
        
The expression in company B represents that is is in arithmetic progression where first term is 42000 and common difference is 1800 . So we have to use the formula of sum of n terms which is

Where a is the first term, n is the nth term, d is the common difference
On substituting there values,we will get

 = 15(84000+52200) = 15*136200 =2043000
And for company A, it is

Difference between them =2043000-2002500= 40500
So the correct option is the second option .
 
        
             
        
        
        
Answer:
11
Step-by-step explanation:
Hope it helps you :)