Answer:
(49 - 29) + 1 =(50 - 29)
Step-by-step explanation:
The 20 comes from the subtraction of 29 in both sides of the previous step equality. In the following, I transcript the complete procedure and I add the step that you need to understand why 20 appears (in bold numbers):
29+20=49
49+1=50
(49 - 29) + 1 =(50 - 29)
20+1=21
50-29=21
hence, it was only nesseraty to subtract 29
 
        
             
        
        
        
Answer:
m∠B =  .
.
Step-by-step explanation:
Since the three sides of the triangle are given, then we apply cosine rule.
 =
 =  +
 +  - 2ac Cos B
 - 2ac Cos B
But, a = 660 cm, b = 680 cm, and c = 100 cm.
So that;
 =
 =  +
 +  -2(660 x 100) Cos B
 -2(660 x 100) Cos B
462400 = 435600 + 10000 - 132000 Cos B
462400 = 445600 - 132000 Cos B
132000 Cos B = 445600 - 462400
                         = -16800
Cos B = 
          = -0.1273
B =  -0.1273
 -0.1273
   = 
Thus, measure of ∠B is  .
.
 
        
                    
             
        
        
        
The answer is 22.976
I hope this helps
        
                    
             
        
        
        
The answer to this is 25%.
Divide 14 to 56. 14/56 x 100/100 = 25/100= 25%
        
             
        
        
        
Answer:
42
Step-by-step explanation:
14 = /3
3 ⋅ 14 = 3⋅ /3
x = 42