Answer:
∠ACB = 28.5
Step-by-step explanation:
In triangle ABC, 
angle CAB = x-3
angle ABC = 4X-3
It is also given that AB=CB
We know that if two sides of any triangle are equal then corresponding sides must also be equal.
Hence 
angle ACB = angle CAB 
angle ACB = x-3    {Given that angle CAB = x-3 }
We know that sum of all three angles of a triangle is 180 degree so let's add given angles
angle ACB + angle CAB + angle ABC = 180
(x-3) + (x-3) + (4x-3) = 180
x-3 + x-3 + 4x-3 = 180
6x-9 = 180
6x = 180+9
6x = 189
x = 189/9
x= 31.5
Now plug value of x into 
angle ACB = x-3 = 31.5-3 = 28.5
Hence final answer is 
∠ACB = 28.5
 
        
             
        
        
        
Answer:
Brand A is the better buy 
Step-by-step explanation:
bag Which is the better buy?
Step one 
Brand A: $5 for 80 pounds of sand 
Let us find the unit cost 
Unit cost =5/80
=$0.0625 per pound 
Brand B: $14 for 175 pound 
The unit cost is 
=14/175
=$0.08 per pound 
 
        
             
        
        
        
Answer:
   214 miles
Step-by-step explanation:
To find the difference between miles already traveled and total miles you need to travel, you subtract ...
   345 miles - 131 miles = 214 miles
You must travel 214 more miles to complete your 345 mile journey.
 
        
             
        
        
        
I would go with B but this is a tricky question. Hopefully i am correct.
        
                    
             
        
        
        
Answer:
His error is multiplying by 4 sides as he thought it was total surface not lateral surface area- the final answer is 12
Step-by-step explanation:
He should have multiplied it by 3, because the 3 sides- not including the base- is what lateral surface area is. He originally did total surface area not lateral surface area so each sides area is 4m squared then you just multiply it by 3 and its 12