Answer:
No I don't agree with their solution; both their answers are wrong.
Correct answer is  .
.
Step-by-step explanation:
Given:

Now given:
According to Mai  and According to Tyler
 and According to Tyler 
Now we need to find which of them is correct.
So we will solve the given equation we get;

Subtracting both side by 1 we get;

Now Multiplying both side  we get;
 we get;

Hence both of them are incorrect, correct answer is  .
.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
observe
||a–b+c|| = ||a+b+c||
(a-b+c)² = (a+b+c)²
(a+b+c)² – (a-b+c)² = 0
((a+b+c)+(a-b+c))((a+b+c)–(a-b+c)) = 0
(2a+2c)(2b) = 0
(a+c)b = 0
a•b + c•b = 0
||a||×||b||×cos(π/8) + ||c||×||b||×cos(θ) = 0

 
        
             
        
        
        
Answer:
<h2>
<em><u>The answer is: 18</u></em></h2>
<em><u>Hope this helps you! </u></em><em><u>.</u></em>
 
        
                    
             
        
        
        
Answer:
Angle 1 is 48°
Step-by-step explanation:
So angle 1 + angle 2 + angle 3 = 180°
Angle 2 = 90°
Angle 3 = 42°
180 - 90 - 42 =  48°
 
        
             
        
        
        
Answer:
c
Step-by-step explanation: