Answer:
20c+14
Step-by-step explanation:
To find the perimeter we have to add up all the sides
4c+6c+7+4c+6c+7
Combine light terms
20c+14
 
        
                    
             
        
        
        
Answer: 4 x 16 = 64 
16 + 44 = 60
I think..
Step-by-step explanation:
 
        
             
        
        
        
Answer: The correct option is D, i.e.,30.
Explanation:
It the given equation we have two units l and dl.
Where l represents the liter and dl represents the deciliter. These are the volume units.
We know that,
1 liter = 10 deciliter
It means,
1 l = 10 dl
Multiply both sides by 3,
1\times 3 l = 10\times 3 dl
3 l = 30 dl
Therefore, the correct option is D and 3 l = 30 dl.
 
        
             
        
        
        
The correct answer is option B
(5 + 3i)(4+ 2i)
= 5(4+2i) + 3i(4+2i)
= 20 +10i + 12i +6i²
= 20 +22i +6(-1)
= 20 + 22i - 6
= 14 + 22i
        
             
        
        
        
Answer:
Lcm=18
Step-by-step explanation:
First do prime factorization of 6 and 9 
common factor of 6 is 3 
and remaining factor is 2×3
Now,
C.F×R.F= 3×2×3
=18